Top Definition
A greeting cultivated originally by a New Jersey FFA (Future Farmer's Of America) chapter; used by people on the street to identify friends or to intimidate geeks/losers/etc. Is answered with a chorus of "yeah, yeah!"
Cool Guy: "What about bumpin'?"

Random Person: "Um..."

Cool Guy: "What about bumpin'?"

Cool Person: "Yeah, yeah!"
by Dan Kisielewski October 14, 2006

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug