Definition from Wiktionary, the free dictionary
The name derives from hip hop. It may also come from resembling a thwomp from the Super Mario series. It takes this appearance when it is tightly packed into a small plastic bag and the edges become ruffled.
twomp (plural twomps)
- (US, slang, neologism) 20 U.S. dollars' worth of marijuana.
1998 July 21, "TSmith6235", “Re: Those new Partnership for a drug-free America commercials...”, alt.drugs.pot, Usenet:
- However, last night we scored a twomp (20 sack) of this extremely chronic weed, and we hotboxed Shaun's car...I was GONE. Just out of it. Almost uncomfortably stoned.
- (US, slang) Twenty.
- Tom Gally, twomp, according to Berkeley High School Slang Dictionary, North Atlantic Books, quoted Feb. 2004.