1 definition by Ben Tupper!
Where someone cuts off the bottom of a plastic cup and puts their balls in a cup and begins to teabag a member of the opposite or same sex.
"Don't make me set my ball in a cup on you!"
"My favourite activity is ball in a cup."
"Dude I don't get how you actually managed to do ball in a cup with her/him!"
"My favourite activity is ball in a cup."
"Dude I don't get how you actually managed to do ball in a cup with her/him!"
by Ben Tupper! August 10, 2008