Top Definition
when you stretch your nut sac out as far as it will go, and then you begin flapping your scrotum sac up and down. Your penis will then bounce off your sac as if it were jumping on a trampoline.
"Have you ever seen a squirrel on a trampoline?" Then let the nut sac flapping begin!!!
by Tea Baggs August 05, 2006

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The act of spreading your scrotum to form a flat surface like a Trampoline and then bouncing your flacid penis like a squirrel bouncing on a trampoline.
At the party Jimbo surprised everyone by pulling out the Squirrel on a Trampoline trick and .
by Haught Carl December 18, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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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