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.