Top definition
When a man stretches out his scrotum sack and bounces his penis off it like a monkey jumping on a trampoline. This technique was created by two brothers from Mass.
Jack loves playing with his sack, his favorite manuver is the monkey on a trapoline.
by Bro#2 January 12, 2006
Mug icon

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