This is where you hide alot of your friends in a room where you know you will have sex, normally done at a party or gala event.

You take a girl (or rarely, a boy) whom you have no respect for into the room and commence having sex with her/him.

Right at the moment of climax, you give the prearranged signal and all of your friends emmerge laughing to scare and severly embarrass the victim
Dude, did you hear about Ellen?

No what happened?

At that party last weekend Cole Closet Monstered her! Matt, Jordan, and Evan were all hiding in the room
by SwissCanadian March 31, 2009

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Top Definition
a person of homosexual tendancies, but does not tell anyone for a long time. They spend a long time "in the closet" thus making them a closet monster.
guy 1: "man did you hear? Lance Bass finally admitted he was gay"

guy 2: "yeah it's about time, that fag was such a closet monster."
by Ryan July 27, 2006

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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A person who acts goody goody in public but then when alone with a person of the opposite sex they.......LOVE THE COCK!!!!
Man, Jasmine is a massive closet monster!
by Pimpin November 20, 2004

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt