Ballsack McGee Share definition Flag Epithet for a dweeb, loser, or any generally disliked person within a social circle. May refer to individuals interchangeably. Dude, keep this party on the DL, I don't want Ballsack McGee showing up. Ballsack McGee by NotBallsackMcGee August 9, 2012 Get the Ballsack McGee mug.