ass knife

when your skateboard gets between you and the ground when you fall and catches you in the junk.

Argh! I missed the rail and got ass knifed!!

by Slyder February 17, 2005

big ass knife

a big ass mutha fuckin knife, as in a big ass blady thingy! kill dem snakes on da plane

Dat be a big ass knife nigga!!!

by bob the reindeer knife masacre September 30, 2013

knife ass

The approximate 2 - 10 seconds of immense pain inside of a female's anus that comes and goes without warning. It feels like - more or less - a knife in one's ass.

Girl 1: *starts to wince in pain whilst squirming in chair*
Girl 2: Are you alright?!
Girl 1: *stops* Yeah, I just had a massive case of knife ass
Girl 2: Aw yeah I hate that

by deuxgatos January 20, 2011