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What seriously stupid people call twenty dollars worth of weed. Some not quite so retarded synonyms would be, a dub, dub sack, twenty sack, etc.
David: Lemme get a twomper yo!
Jon: No, you're a fag.
David: Seriously, hook it up.
Jon: No seriously, you're a douchebag.
by Jon293i14i129 September 11, 2007
Twenty dollars worth of cocaine.
Lets pick up a couple twompers and hit the bars.
by Danny Boy Ash March 14, 2010