Green’s Dictionary of Slang

1. large.

1796		Hants. Chron. 16 June 3/3: No ladies of the name of Carrotty Bess, Bumping Moll, Goggle-eyed Nan, or Draggle-tail Jenny were of the party.
1876		C. Hindley Life and Adventures of a Cheap Jack 172: People rolled up in shoals. The consequence was that there was a bumping house.
1904		B.L. Farjeon Amblers 98: I promise that you shall each of you have a bumping house, and you will go to London with your pockets well lined.

2. (Aus. / US black/campus) exhilarating.

1913		Sport (Adelaide) 22 Feb. 12/2: They Say [...] That Harry Q, of Exeter, has returned after a bumping time at Mount Gambier.
1988		Eble Campus Sl. Oct. 2: bumpin’ – great, fantastic, awesome.
1992		N. Stephenson Snow Crash (1993) 72: We were just fooling around at this arcade on the Street. Pretty bumpin’.
2000		Ebonics Primer at www.dolemite.com 🌐 lo-lo Definition: a lowrider Example: Peep my lo-lo, that shit be bumpin.
2015		P. Beatty Sellout (2016) 203: It was like [...] when you enter a banging-ass house party and shit’s bumping.

3. (US campus) stylish, attractive.

1989

Eble Campus Sl. Mar. 1: bumpin’ – stylish, good looking. ‘You’re sure looking bumpin’ tonight.’.

4. (US campus) crowded, busy, active.

2012

C. Eble (ed.) UNC-CH Campus Sl. 2011.