1. Deriving from the verb to laugh. It is the act to move the body in an uncontrolled and unintentionally way due to a heavy laugh.
2. The vibration supplied from your body due to laughing, in somehow implement the vibration of a building due to an earthquake.
1. This morning I had a laughquake because of how skyler was sleeping in class (so that other people can hear and see).
2. It was so funny that she had a laughquake!