From Rap Dictionary
- To make a car with hydraulics bump. "Why you gotta pull me over... cause I'm bumpin'" -- Warren G. (I Shot The Sheriff).
- A line of cocaine or any other snortable drug.
- To have sexual intercourse: "Lemme bump it". It is used by a male that wants to have sexual intercourse with a female. It is like saying "lemme hit it" but instead of hit use bump.
- To fight, e.g. "She was runnin' her mouth so we're 'bout to bump"
- To listen to music. "What track you bumpin to?
- The bumps caused by herpes on a female's vagina. "Dat mad bitch done got bumps all ova dat pussy, mothafucka!"
- To BUMP a topic (in forum) to post in it so it will be at the top of the page