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1.
see BUMPIN

same as bumpin
bumpin is to describe a person with loud ass subs while pumpin is a person without subs that turn it up loud

loud treble/bass

being used recently in the projects
damn dawg, that foo's car be pumpin.
fo sho homie, sounds decent for not having subs.
by loud speakas July 25, 2006
 
2.
Sellin drugs or slangin
"He be pumpin on your block, ya man gave em your glock.."

Nas 1994; Illmatic- One Love
by squarecnix April 28, 2009
 
3.
Awesome, off the chain, dope, bad ass, etc.
I heard that party was crap.

-Naw, man, that shit was mad pumpin'!
by mVal September 15, 2006
 
4.
In Queer speak, to walk fiercely from one point to another, as if you were a drag queen or some fabulous supermodel.
Look at Miss Honey, walkin' down the street, pumpin' like Ms. Naomi Campbell! WERK BITCH!!!
by Lola and La Lencha October 13, 2009