If you poke your belly button, your bum falls off.
Used as a less vulgar version of "lmfao."
Derives from eccentric grandmothers who use obscure terms.
#1: <bum falls off>
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from email@example.com. We'll never spam you.
Log in with Facebook to save your favorite definitions
and share them with friends.