doing naughty things, being bad, doing something that society sees as bad or wrong, being evil, not caring, comiting a sin.
example 1:
person 1: Hey did u comit a sin last night?
person 2: Yes, i had a one night stand, if that's what you ment.

example 2:

I didn't listen to my parents. Oh, i'm so sinful.

example 3:
I like that hot ass guy with tattoos! He looks so sinful.
by daymgirl January 06, 2010
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Term used by the spiritual and religious community for 'evil' actions deemed to have a somewhat deserved unforetelling or difficult circumstance. Usually linked to 'fleshly' behavior or desire.
His sinful action caused her to benefit in alimony.
by Zandroid August 18, 2017
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Something thats is/was sly or uncalled for. Usually used in eastern Ireland
Mr Daddy Carey- "ah that's sin, lad"
by ImGoneLad November 02, 2013
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Used at the end of a sentence to emphasize how you feel or think about something or what you are doing. Can be used as exaggeration or sarcasm as well.
That science test was hard as sin.
I am tired as sin.
That girl was ugly as sin!
by katquitlollygagging May 27, 2008
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Sinner: Is fucking before you're married a sin?
Saint: Yes.
Sinner: Damn.
by An insane badger August 10, 2009
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“I’m going to hell for my sins, I accidentally made eye contact with a female!”
by Catra February 02, 2020
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The Greek biblical word for sin, "amartia", means literally "to miss the mark", like an archer. Sin is not necessarily defined by moral wrongness, by transgressing some set of rules, but is instead doing anything that takes our focus off God (the target), onto ourselves, thinking we are the be-all-and-end-all.
"Sin is nothing else than to neglect eternal things, and seek after temporal things" -- St. Augustine
by The Immovable Object January 14, 2004
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