Derived from the sound food makes when falling from a row in a vending machine, "thunk" is a general term for food you buy when you have the munchies, but your funds are limited to small change only.
Imagine the sound made by a Honeybun when you buy it from a machine after smoking pot all night.
Dude, you're eating thunk.
Dude, let's go get some thunk.
Dude, you're eating thunk.
Dude, let's go get some thunk.
by Devlan July 27, 2006