Green’s Dictionary of Slang

lappie n.

[Afk. lappie, a rag, i.e. that into which the solvent is poured prior to being sniffed]

(S.Afr. drugs) the sniffing of solvents; also as v.

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[SA]A. Lovejoy Acid Alex 149: If you sniffed benzene – it put you on a buzz. He called it lappie. [Ibid.] 152: I didn’t want to lappie in the toilets again. They made bad hallucinations come.