A fent plug is a drug dealer who sells illicit recreational substances laced with fentanyl.

Fent plugs typically do not realize the product they sell ends up having trace amounts of fentanyl until one of their customers is dead.
Guy 1: Hello friend, could I interest you in a wee-bit of za-za?

Guy 2: Why sure, I would love some za; by chance, did you obtain this from *drug dealer name* ?

Guy 1: Yes I did, is there a problem?

Guy 2: I will not be participating in consuming za-za from that person, he's a fent plug!
by I'm not a kid September 26, 2022
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