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3.
A term that can be used to describe a cutely small, fat kid who appears as round as is tall. They look like you could turn them onto their bellies and bounce them up and down. It is often used as a schoolyard insult amongst young children.
"Ahhhhhh, he's a little bouncy ball. Look at him eating that ice cream while it drips all over his face! How strangely cute!"
by Cato at OrSU August 24, 2009
 
1.
nickname for heavy-set short person that appears almost to be a perfect sphere
she looks like a bouncy ball!
by Di A. Rea May 04, 2008
 
2.
To jump up and down making your testicles bounce, in turn making bouncy balls
check out these bouncy balls
by Ron Ron Juice January 28, 2011