A pipe or rig used to smoke "chunk" dope or fent dope. Also commonly used to smoke M30 percocet pills that contain fentanyl. Gets its name from users typically loading a "chunk" of dope into the bowl before heating it. Smoking from a chunk piece is preferred by some smokers instead of running the foil.

Opioid users sometimes use the slang term "knocking" in reference to smoking from a chunk piece, in reference to the "knock" sound that fent dope makes during vaporization.
opioid user 1: you smoke any of that new hulk batch yet?

opioid user 2: I was knockin' it out the chunk piece last night, had me falling asleep
by Tatertots 5 October 24, 2022
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