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2. to shank
To shank someone means to give then a beat down / fuck them up

This can be done either virtually (COD4) or physically (someones face)
To Shank

Joe: I will shank you !
James: Aw Shit !
1. to shank
to shank...duh...well to hit someone with a homemade knife
bill: i am going to shank you!
joe: o no please dont