Top Definition
A frightening mother. Comes from the video game Bart's Nightmare, which had an enemy that was Marge as a Moth, called Mothra.
Momthra's coming. I can hear her feet stomping! Hide the AIM chats!
by Jesse August 11, 2003

Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×