Top Definition
Using someone else's achievements and/or good name for personal benefit. Posing as someone with status and placing those achievements on yourself.
Aaron Clinton Atkins III would have you believe he is as talented as his uncle Juan, however he is an impostor.
by ConcernedTechnoHistorian November 19, 2011

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Someone who pretends to be someone else, usually in a serious setting, where the impostor is doing some sort of damage
That surgeon who did Jane's tonsilectomy? Turns out, he was an impostor. He had a real job as an orderly in the hospital, but he was really good at snowing people and hacking computer records. They've got him locked up and his two wives are trying to bail him out.
by OsamaBinLogin January 27, 2009

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