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The word Yay is derived from the spanish word llello (pronouced yay-yo) which is slang for la cocaína, or cocaine.
WE GON' GET SOME YAY YAY MY NIGGAS
by LiDsY July 03, 2013
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A beautiful, gorgeous girl, who likes to wear her stunner shades.
Traditionally, sung in a song: "I love Yay Yay because she's so gorgeous, she's so stunning!"

As well, it is often yelled, "Mama! Yay! Yay! Mamaaaaaaa!"

In tagalog, "Meron silang nang Yay Yay."
by MMMMMMMMMMMMMMBreezy November 20, 2008
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