Yat (yāt) interj. : A combination of the words "Yay!" used for expressing elation, and "What?," resulting in a word one uses when responding to a statement that may demand an excited response, but the responder is unsure as to whether or not they should be thrilled about said statement.
Person #1: "Hey - ! Would you like to go see the new exhibit at the Museum on the Dromaeosauride families - ?!"

Person #2: "Hells yeah ... ! (What's a Dromaeosauride ...?)"

Person #1: "I know! I'm so pumped for this! Yay - !"

Person #2: "I know ... ! Me too!

Person #2: <enthusiastic nervous laugh> Yat ... !

Person #1: "Wooooo !!!" <fist pump>
by J-Nabi July 19, 2010
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I will yat my phone at you tomorrow, because I hate you.
by Cornstarch03 November 13, 2017
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A posh name for a young, attractive, female, teenager....hence Y.A.T
Other uses:
Yats (pl. of Yat)
Yattage (group of Yats)

Mate, come out of Jack Wills and check out these safe YATS cruising the KR...
by Caadon February 20, 2009
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is your yat speedy?

I wanna ride your yat
by sundayanimationnight April 11, 2011
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Meaning 'Hell yes' or 'Awesome'
Person A: "This party is lit!"

Person B: "Yat!"

* * *

Person A: "I just drew this pigeon, what do you think?"

Person B: "Looks super yat, man!"
by B.pics_Z26 August 6, 2018
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idiot: "I like Kuh"
god: "You are clearly an idiot, Yat is better"
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