To materbate. Self Inflicted Nut.
by o d b October 31, 2010
SIN actually stands for Sexy Irish Nerd. By definition all irish guys are sexy; however, only a elite few are actually sexy irish nerds.
by Dave (aka "THE SEXY IRISH NERD") May 05, 2004
A majorly Lame Battlestations Clan that Gets Pwned repeatedly..... Especially by MAD the bestest most happy wee inducing Clan in the world!!!
MAD FTW!!!!
MAD FTW!!!!
SIN is Fail!
by FlAmEhErO March 23, 2011
by ImGoneLad November 02, 2013
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.
by katquitlollygagging May 27, 2008
by Catra February 03, 2020
by Onias Ben israel July 25, 2019