This is a insult you use to people who carry out really dumb actions. Use this insult sarcasticly!
Someone (Wise Duck) that tries to shave their beard with a electric meat knife, not thinking of the consequences ie total annihilation of the wind pipe!
bump or gangster bumping is when your driving your car you hold the steering wheel with one hand and bump your whole upper body to the beat of the music. You must have you window open and your other arm out of the window.
Its a more extreme version of head bobbing!
Andy: "Wow is that dude trying to remove his car interior!"
Seaward: "No..he's gangster bumping!!!"