1: the release of seismic energy from the friction between moving plates in the earth's crust.
2: natural selection for Californians.

a natural phenomenon which is no longer a phenomenon for the people of Japan.

A prank in which someone shoves a boy or man who is urinating into a urinal, yelling 'Earthquake!'

When all five fingers are either in the ass or the vagina (but not both, unless you are going for the double)and the person moves his/her hand in a rapid wiggling motion.

when a man puts his hands or face in a womans breasts and shakes them vilontly.

When everyone has a mini seizer at once.

When you're having sex and your partner has a seizure.