Top Definition
A rare, genetic condition found in males, usually surfacing at the on-set of puberty; the result of which is a swift plummeting of the carrier's overall intelligence.
Young Abraham quickly went from smart as a monkey to dumb as a chimp, as a result of his dumbening.
by Michael T. Lynch Jr., Scientician October 12, 2003

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Describes the ever increasing lack of common sense and/or intelligence often displayed in society today.
This is an example of the dumbening.
"What language do they speak in England?"
"Did he really ask that?"
"Yeah, it's The Dumbening."
by Jus. July 16, 2008

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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.

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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