The term "sinner" refers to someone who has not repented and believed in Jesus and whose life is characterized by self centered behavior and sin. (As in 1Cor 6:9-10)
But there is nothing in scripture that says that born again, spirit filled, saved and faithful believers never sin. John tells us; "
If we say that we have no sin, we deceive ourselves, and the truth is not in us." and that "
If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness." (1 John 1:8-9)
Note that John says "
we" and, thereby, includes himself among those who from time to time sin.
The term "sinner" refers to a person whose way of life is characterized by sin.
While a saved person may sin, his life is not characterized by sin.
When we are risen from the dead and joined to Christ in His kingdom, then we will be completely sinless. (And, of course, we do not sin while our bodies are dead and buried!)

:amen
Just for readers edification ,
this is not in the linked article to the Berean site. "The term "sinner" refers to someone who has not repented and believed in Jesus and whose life is characterized by self centered behavior and sin. (As in 1Cor 6:9-10)
But there is nothing in scripture that says that born again, spirit filled, saved and faithful believers never sin"
This however, is in the article.
Are Sinners Christians?
As a new believer my wife Dar and I often went for brunch after church with our friends. I clearly remember asking the men what they thought about living a pure and holy life. Ill always remember the response of one of them: Bernie, we sin hundreds of times every day. All you have to do is confess your sin and God is faithful and just to forgive you. By that time I had read 1 John and knew what the Apostle said in his first epistle about the relationship to God of people who continue in sin:
No one who lives in him keeps on sinning. No one who continues to sin has either seen him or known him (1 John 3:6). We know that anyone born of God does not continue to sin; the one who was born of God keeps him safe, and the evil one cannot harm him (1 John 5:18).
How good was my friends advice? Was my friend living in him? According to the Apostle John, if my friend was sinning hundreds of times each day he was not living in Christ Jesus and did not have a saving faith. Twice John says Christians do NOT continue to sin.
Just how serious is sinning? Is it a good idea not to sin because it may offend others? Or does sin carry with it eternal consequences? Jesus answered those questions with a gruesome example to make his point:
If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. 30 And if your right hand causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to go into hell (Matthew 5:29-30).
As his example shows, Jesus connected sinning with being condemned to hell. In his parable of the weeds, Jesus further confirmed that sin will cause condemnation when he said, The Son of Man will send out his angels, and they will weed
out of his kingdom everything that causes sin and
all who do evil (Matthew 13:41).
The writer to the Hebrews addressed the issue of deliberately continuing in sin. His warning is frightening:
If we
deliberately keep on sinning after we have
received the knowledge of the truth, no sacrifice for sins is left, but only a
fearful expectation of judgment and of raging fire that will
consume the enemies of God (Hebrews 10:26).
It would appear that those who have received the knowledge of the truth but thereafter deliberately continue in sin are in a terrible position. They are called enemies of God.
In our 21st century, it is politically correct to have a tolerant attitude toward almost everything. That seems to include sin. There is not an abhorrence of sin, of seeing it through Gods eyes, nor a recognition that continuing in sin will prevent a person from inheriting the kingdom of God. Not concerned about being politically correct, Paul wrote:
But now I am writing you that you must not associate with anyone who calls himself a brother but is sexually immoral or greedy, an idolater or a slanderer, a drunkard or a swindler. With such a man do not even eat (1 Corinthians 5:11).
Paul warns that a person who continues in sin (a sinner), but who calls himself a Christian brother, is dangerous to the health of the body and should be shunned. From Johns writings we know that such a person is not a true believer even though he may be a professing Christian.
We know that Christians will one day enjoy eternity with God in heaven. But what about sinners? Is it possible that they can also go to heaven? Paul answers that:
The acts of the sinful nature are obvious: sexual immorality, impurity and debauchery; idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions and envy; drunkenness, orgies,
and the like. I warn you, as I did before, that
those who live like this will not inherit the kingdom of God. (Galatians 5:19-21. See also Ephesians 5:5-6 and Colossians 3:5-10).
For the many sins Paul listed above (and other sins like them), Paul said those who live like this will NOT go to heaven. They are not Christians. They are not saved. Paul said those who live like that will not inherit the kingdom of God. In Colossians 3:5, he added that because of such sins the wrath of God is coming and sinners will face the wrath of God. God will condemn sinners because they continue in rebellion against the Lord Jesus who has commanded that we not sin.
Paul emphasized: For
the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord (Romans 6:23). At Romans 2:5, Paul states: But
because of your stubbornness and your unrepentant heart, you are
storing up wrath against yourself for the day of Gods wrath, when his righteous judgment will be revealed.
Paul recited for the Colossians sins that will invoke Gods wrath:
Put to death, therefore, whatever belongs to your earthly nature:
sexual immorality,
impurity,
lust,
evil desires and
greed, which is idolatry. Because of these, the
wrath of God is coming (Colossians 3:5).
All
these warnings are directed to Christians. They are obviously intended to warn the Christians against the sins Paul has listed and to show that the life of the true believer is quite unlike the life of the unbeliever who often participates in such sins.
Gods wrath is never exercised toward his children those Christians with a true, saving faith. His wrath is always toward those who are in rebellion to him, who have chosen not to receive his Son Jesus as their Lord. The visible evidence of that rebellion and rejection of Jesus as Lord is a life lived in sin.
Can We Be Saved and Live in Sin?
Is it possible to be a true Christian, to be saved and yet live like this? (See Galatians 5:18-21). No....... the full Berean article is in full here
http://www.bereanpublishers.com/are-christians-sinners-or-saints/