Top Definition
Where a person (usually a guy) is barely worth attention with his glasses on, but when he takes them off you notice how very hot and attractive he is.
(sees guy without his glasses)
Girl 1: OMFG! Where are you glasses?!
Guy: I got contacts.
Girl 1: Aha..... (distracted)
Girl 2: (whispers) Clark Kent Syndrome.
Girl 1: Yeah, totally....
by 1mad_scientist December 01, 2009

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Based off Superman, it's the inability to notice that someone wearing glasses and that person not wearing glasses are the same person.
Kyle: Tim? Is that you?

Tim: Yeah.

Kyle: Oh. I almost didn't notice you with your glasses on.

Tim: Yep. That's Clark Kent Syndrome for you.
by Rommer711 August 24, 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.

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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).

Buy the t-shirt