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 24, 2005
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1. (n.), a day when a man cannot have sexual relations with his significant other for various reasons

2. (n.), saying "monday" with a weird accent
1. Jim's wife was going out of town on a business trip, and there would be many moondays before she returned.

2. Our term paper is due on moonday.
by Kriptini June 19, 2010
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Casey Berard posted a snapchat about Moonday on January 17, 2022, and now this is on Urban Dictionary.
by gbabyulm16 January 18, 2022
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a day in which a blonde (or claire) considers to be a full moon.
ella: "I think i'll have a party moonday"
claire: "Is that when like there's a full moon or something?"
ella and rachel: "No stupid, moonday = MONDAY"
by stoneleighite November 7, 2006
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A Monday that comes out exactly when the moon is full
Guys, I have good news for you. It’s Monday, and the moon is full. That makes it a Moonday.
by bluestinger66 October 27, 2022
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