The biological cousin that moreso performs or holds the role of an Aunt than a cousin to you.

Comes from the blending of Aunt + Cousin (Au from Aunt + Sin from Cousin)

Originates from the Midwest USA in 2020.
Hey, my Au-Sin is going to drop us off at the salon. Who? My cousin, but she's old enough to be my Aunt.
by Missing Apples 24 April 2, 2023
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a sinful and wretched person that brings disgust in every domain, but mainly morally.
*somebody sends a photo of a girl on tinder* - Jesus Christ she's heaven sin.
by NickBurgio November 29, 2021
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After sex, popping your vagina into another woman's vagina instead of making your husband a sandwich.
As soon as Ben ejaculated with shame into his hand, Candace ignored him and made a sin sandwich with his wife.
by Toomanycommas March 26, 2023
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A phrase common in the south and/or bible belt region of the US. Typically means that an action or attitude is negative or not a very healthy state of mind/body that isn't actually condemned in the bible (nor endorsed by it either).
Billy Joe: "Man y'all know I cant come visit you in Mississippi, I've got work all week"

Bobby Sue: "All y'all working is gonna put you in the grave and all your free time is spent at home and I think it's a sin"
by forwhomthebellstoll July 25, 2019
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A phrase used in the Lacrosse community to describe an unacceptable combo of clothing that makes you look like an absolute rookie with no skill.
Did you see Alex wearing a collared shirt under his shoulder pads? Total drip sin...
by KamikazeScotty April 15, 2022
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CORRUPT GOVERNMENT OFFICERS OR MONEY LAUNDERING BUSINESS FUGITIVES WHO FLEE TO ANOTHER TAX FREE COUNTRIES FOR ASYLUM
AFTER THE TELCOGATE SCANDAL, MANY THAK SIN FLED TO SINGAPORE
by ANUNE_FAT988 March 17, 2022
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Sin on a Chicken Wing is someone that you would very much like to violate (male or female).


Person 1: You see that Sin on a Chicken Wing over there?
Person 2: Yes.
Person 1: You always huckabee, yes?
Person 2: I would huckabee that SOACW. On purpose.
by Penny Dreadful March 1, 2009
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