To prank someone by sneaking up behind them while holding the bottom of your shirt, jumping, and rapidly forcing your shirt over their head and off again before you hit the ground.
Did you see that? Jake just flumped Abhi so fast Abhi didn't even see it coming!
a chateauguay slang word for pot... It can also be the act of smoking pot where FLUMPING is also acceptable... a FLUMPER is a joint... to be FLUMPED is used but not often
Gordo took out some flump, rolled a flumper, and went out side to flump. When he was done flumping, he was totally flumped.