Top Definition
The involuntary action of laughing while asleep. Not to be confused with dreams of laughing, but rather you laugh in real life while still being unconscious.

This is much similar to sleep walking.
Wendy had an uncontrollable fit of Sleep Laughter!
by kyjds March 23, 2013

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.