Top Definition
A person, or persons, who is being a real downer on the group him/her is in.
"..you know that's not how it works.."
"you know what Steve? you're being a real Horse's mule!"
by BonerFEST January 22, 2009
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.

×