Used as an exclamation of pleasure, approval, elation, or victory.
by IAMSODOT March 12, 2004
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Slang for Cocaine, popular in California's Bay Area.

I'm so strung out from all the yay last night
by Bookworm February 3, 2005
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A slag word for cocaine mostly used in Southern California
by Bigbankroll562 December 22, 2017
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Often used as an exclamation for joyous occasions. Also sometimes used as a slang term for "this" when describing an object or person.
Man: Did you see a man go by, about yay tall?
by Happpinesss June 5, 2010
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1. Slang for Cocaine.
2. Slang for cocaine that is relatively cheaper than the real stuff because it has been cut into a much less pure form.
3. An expression of enthusiasm or joy, often meant to be facetious.
Yay, a bag of Daz!
by Illusion420 August 31, 2010
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A unit of length commonly applied in the study of caldera volcanoes. Approximated by 1/2 an arm span of a tall university professor.
The pyroclastic fall deposit here is about yay thick *holds arms out to show size*.
by Aegerine October 8, 2014
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