Top Definition
to trip or be out of control while on a "pleasure drug" such as X, heroin, or cocaine. The term is of course loosely based around the drug abuse history of former-child actor, Corey Feldman.
"Dude, check out lewis! he just did like 8 lines, and he is straightup feldmaning all over the place!"
by outercourse June 08, 2006

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