Top Definition
That nasty collection of plastic balls at the playgrounds of fast food restaurants across this great country of ours. Those balls aren't wet because it rained, it's because some kid peed in the play structure.
Child: “Mom, can I go play? I’m done with my happy meal.”
Mom: “Yes, just be sure to stay out of the urine balls.”
by workinglate May 11, 2005
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