(n.) A little-known-of shank
made from a dried-out, hardened, and sharpened piece of human feces usually used in prison as a means of defense or attack.
1. Yo, I heard TK got out of da clink early because some dude stuck 'em in the leg wit a poop shank and he caught a bad staph infection.
2. - Yo, you hear about Ravo?
Dude was hittin' the joint late night and some dude stuck 'em wit a poop shank right when he was gettin' 4 all da way.