A verb meaning the act or process of entering a room by throwing yourself through a door with force similar to the force used by the Kool Aid Man in Kool-Aid commercials. The Kool Aid Man typically busted through doors or walls and said "Ohh yeah", but when Kool-Aid-Manning in through a door you've the option of also saying "What the fuck are you kids drinking?"
Mystery Person #1: Dude, Nathan was in bed and his door was closed, so I kool-aid-manned it through and now his door is torn up. He's pretty pissed.
Mystery Person #2: Yeah, he's got $3,000. He can fix it.