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1 definition by loud speakas

 
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