Top definition
When a guy gets a compliment or makes a move that makes his ego go through the roof.
Sarah: "James thinks he's SO cool, because he hangs out with college girls and he's in highschool..."
Amy: "he's just getting a ball booster."
by smellslikejuicy7 July 06, 2011
Get the mug
Get a Ball Booster mug for your father G√ľnter.