Top Definition
The joy and thrill of being able to prove that a certain number is irrational—that no fraction could capture it.
Although the ancient Greeks knew 2000 years ago that the square root of 2 is irrational, mathematicians had to wait until the 18th century before they could experience their irrational exuberance moment about the number π.
via giphy
by MathPlus October 08, 2016

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(from Investopedia.com:) An infamous phrase uttered by Alan Greenspan in 1996 to describe the overvalued market at the time.

Really, it means you're way too happy about something.
ME: Holy crap, did you see that?!
DUDE: Man, you got a problem with irrational exuberance. STFU.
ME: THAT KICKED ASS!
DUDE: Seriously, STFU!
by pinano July 14, 2004

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Lotsa space for your liquids.

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Your favorite word on a white mug.

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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