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1.
When you say somthing to piss of someone so that they will want to fight you.
Ass: Bet you hit like a little bitch.
Someone in the room: Charge up! Bet you won't hit that nig!
by JesusPotPie August 11, 2006
 
2.
What some people do to get pumped or psyched before a game.
Hey everybody look! David from Bokey is about to charge up!
by mikey the swimchamp November 12, 2005