1 definition by Biff Masterson

Top Definition
Something people occasionally get a case of on the first day of the modern work week. Add extra "oooo's" as necessary.
Office Worker #1: Good morning.
Office Worker #2: (No response)
Office Worker #3: Sounds like somebody has a case of the Moondays.
by Biff Masterson May 23, 2005

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.