Top definition
An intense amount of vibratory sensations in the mouth brought upon by many things including pop rocks & pop &/or alcohol, vibrators in the mouth, or certain bitchslaps.
I was eating pop-rocks and drinking rum lemonade and had a 7.2 mouthquake.

That pornstar is totally having a mouthquake right now.
by badluck13_7 May 13, 2011
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