A term used when a person tries take a personal morally based object from another human. Also, whenever a bitch ass college kid is bitchin about how he ain't gettin no bitches on his dick and he claims he gonna tonight, you strike his ass down with the y'ain't. Taking away any human basic right is also appropriate. Its a conjugation of you and ain't, resulting in y'ain't.
"So, I'm gonna talk to her tonight."
" Y'ain't"
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*Tries to take your pants off*
"Y'ain't"
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"I'm gonna jump off the roof."
"Y'ain't"
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.