Top Definition
Someone who never leaves their own home, specifically their room.
Have you seen Derek lately?

No, he's a basement monster man. I don't even think he showers.
by SJeffries April 08, 2009

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The basment of one of your friend's that has a monster living in it. This monster never actually is seen but its presence can be noted when large amounts of weed magically disappears in the basement. It is also known to take lighters, controllers, and any other item that would be useful at that time.
Person 1: Dude, we just lost 5 ounces of purple haze at Jeff's basement!!

Person 2: The basement monster attacks again
by basementmonstervictim September 12, 2010

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