A person or thing who thinks he is brighter than he is. Or, one who would like to be brighter than he is. Flat Champagne.
The Vice-President of the Condo is a dim bulb. We call him Dimmy. The only Champagne he drinks is flat like a dim bulb.
by Knockings July 11, 2011

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Top Definition
a very stupid person
Gary must be the dim bulb in that group.
by familyguy April 26, 2005

The Urban Dictionary 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 witless one
humorless and without remorse
a broken unit
he's just a dimbulb.
that is all.
seriously now
by dimbulb October 30, 2003

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.

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