labsbuster Share definition Flag female equivalent of ballbuster. someone who does to females what a ballbuster does to guys. he was a real labsbuster, always giving girls a bad time. a real ballbuster too, never letting up on the guys. labsbuster by erinksboyfriend September 3, 2010 0 0 Get merch Get the labsbuster mug. Buy Now — $32.95 See more merch