z bomb 

Slang term for xanax pills, popularized at Virginia Tech though origin unknown.

Yo if I eat more than 10 z bombs I might be liable to rape a bitch.

z bomb by Dicky P January 29, 2008

z-bomb 

The act of throwing a uppercut and connecting so perfectly that you crush your opponents face and put them to sleep, literally.

Alan threw an iron-fisted z-bomb in a drunken fury and put his opponent to sleep.

z-bomb by Mike Jaing June 12, 2007