Top Definition
Someone who is a killjoy. Sucks the fun out of people and or moments. Ruins a joke.
Boy everytime I am around her she ruins the mood by being a real Fun Nun!
by Samtonio Boyderas January 10, 2014

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.

×