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1. YK
To commit an unusually large, noxious, and possibly toilet-breaking bowel movement, usually in a public restroom or someone else's home.

Source: Internet fora.
"Man, don't go in there ... somone laid a YK!"

"Dude, I was on a date and I totally YK'd the chick's house."
by Fed Mar 9, 2005 share this add a video
2. YK
The motherfucking boss.
Yo did you see YK?

How could I not? The aroma of him left me panty-less.
3. YK
Used in the Bust Cap linguistic system, to fuck
"Bust this shit"
"Bustin"
"YK thrice, DT all day long"
"Chinnie!"
by Justyn Mar 15, 2005 share this add a video