A slang term for frozen meat defrosting in a pool of water in a Tupperware container in the back room of a "D" list restaurant. This term was coined by chef Pinto of Cafe 36 on an episode of Gordon Ramsay's Kitchen Nightmares.
The single most horrifying weapon ever conceived by mankind. The mere mention of such a diabolical utensil is enough to send a sane man hurtling into a downward spiral of madness. The threat of a frozen poop shank is not one to be taken nor delivered lightly, for the second a man starts sharpening his shit in the freezer is the second he has nothing to lose.
Man 1 pulls out a knife and demands Man 2's wallet. Man 2 reaches into his lunchbox and pulls out a frozen poop shank and demands Man 1's wallet, and receives it.