Top Definition
Used in the binge-drinking themed sport of Beer Pong. While the game of beer pong requires that a ping pong ball be thrown from opposite ends of a table into solo drinking cups filled to a level with domestic beer; throwing a "Dirty Ball" is to toss a ping pong ball without rinsing it in the designated "water cup" with the intent of fouling the opponents domestic beer filled cup without their knowledge.
So what, I threw a dirty ball, they were winning by 3 cups and I was wasted!
by Isaac Fisher May 21, 2006

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to cup someone's balls into your palm and then insert index+middle finger into anus to massage prostate. then pull out fingers covered in shit and wipe onto bottom of nutsack
i gave Pedro R. dirty balls after he tried to rape me, stop giving me dirty balls!, he gave me dirty balls when I kissed his mom
by JayBallsack November 20, 2012

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt