put you a knife

To stab or cut you. Most often used as a threat by a diminutive Latino with neck tattoos and a heavy Spanish accent.

Don't mess with my homies or I'll put you a knife esé.

Knife Sister

A sexual act between two females in which each woman's ”Big Toe” is entered into the others vagina simultaneously As an act of camaraderie or partnership.

I heard those two were Knife sisters...

knife that hoe

Seeing a woman look with a sexual desire toward your man, so you get up walk over to her and stab her in the boob.

Me and my boo were at the club and i saw this thirsty chick looking at my man so i went over and "knife that hoe"

Nigger knife

A knife intended to be used on niggers.

I'm going to take my nigger knife on the subway, in case there are blax playing the knockout game.

butterfly knife

a knife that has no use other than to impress people by risking their fingers

sick butterfly knife bro, can i try it? AAAAAAAAAA MY FINGERSSSS

A knife in our plans

A phrase, like "to through a spanner in the works", it means to mess stuff up. It is a common phrase on the west coast of the U.S., it is more commonly used with the younger generations, yet, it can also be used by older folk.

Oh, I forgot the tent, I guess we need to go back home.
Well, that really is a knife in our plans

Goshen Knife

A sharp implement, most of the time a knife, that is the most redundant and useless piece of equipment that a Boy Scout can purchase at camp Goshen.

Wow, you bought a Goshen knife, you must be stupid.