1 definition by SUPERMA5TER
An acronym for "Bitching under my breath" (bumb); When someone complains under their breath but still loud enough to be heard.
"I would be bumbin if that shit happened to me, bru"
"My mom heard me bumbing and now I can't play xbox tonight"
"My mom heard me bumbing and now I can't play xbox tonight"
by SUPERMA5TER September 7, 2023