A game whose object is for one male to slap another male in the balls for the sole purpose of everyone else's amusement. The game is generally played on a specific day of the week, namely Sunday. There are also certain variants of the game, such as including women and adding beaver chops to the game. Also, no slap backs, so you can't right away hit the balls of the person that just hit you.
After putting up with that stupid asshole all week, I couldn't wait to chop Elliott in the nuts on slap ball Sunday.
by Josh the expo July 11, 2006

Niagra Balls is a variation of teabaging. While similar to teabaging in that the man will slap the person(s) with his balls or dip his balls in the persons mouth, with Niagra Balls the man pee's down his balls while teabaging the person. Thus creating Niagra Balls.
"My testies + My piss + Your face = Niagra Balls. Sink or swim biotch!"
Niagra Balls became in September 2007.
"My testies + My piss + Your face = Niagra Balls. Sink or swim biotch!"
Niagra Balls became in September 2007.
I gave her the Niagra Balls last night. She said the view was breath taking. When you pee while you tea, you make Niagra Balls.
by Eugene Collins, Kevin Price September 26, 2007

by Sk8forTACOz June 7, 2014

by pooshoe May 15, 2006

by FBM July 17, 2003

by Cyphaer April 20, 2007

by anonymous January 20, 2005
