Urban Dictionary:
shank
orgin: prison slang
A homemade knife.
made out of scrap of metal found anywhere and sharpened like a knife. and bottom tightly wrapped with a cloth as a handle.
Wikipedia:
Shank is the lower part of the leg; shin.
It may also refer to:
Shank (meat), a cut of meat (e.g., beef shank)
Shank (video game), an action game
Shank (2009 film), An LGBT based film
Shank (2010 film), a thriller set in futuristic London
Shank (sewing), such as button shanks and thread shanks
Shank, a play by Richard Vincent
Slang for shiv, a makeshift knife
Shank, a poor golf shot
Shanks, wading birds in the genus Tringa