Top definition
When sitting on a couch with a friend you fart so hard it rumbles all the cushions on the couch. Resulting in a vibration under yours and your friends butt.
Friend 1: makes a loud rumbling fart on the couch

Friend 2: Hey what was that!

Friend 1: Sorry yo! You just experienced a california couch quake
by solomynolo June 24, 2012
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