shorthand/abreviation for Yagami Yato
"hey have you heard the new yy audio? its everything to me"
by zaddy42 October 12, 2020
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A guy that has a big and enormous nappy that he has
Jack has a Big YY
by Bomomodickson November 29, 2017
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acronym for "you must be pretty proud of yourself"
Sean: "I got an A on the test balla."
Jeremy: "YY"
by MarjoryStewartBaxter July 23, 2005
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Imitated or copied.

Chinese knock offs that steal your IP almost exactly.
You’re not legit till you get YYed.
by Workinlocal July 14, 2018
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YikYak; a smartphone app in which you can chat with people around you anonymously. It's popular in college areas especially in the US.
"How's your summer class going?"
"It's so boring. I'm there on YY must of the time"
"What's YY?"
"YikYak, you don't know it? Go and check it out it's worth trying"
by AxMan(>|<) July 07, 2015
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YYS means yee yee school. That means. there’s a bbq every homecoming and once a year, the boys gather up and ride a tractor with a trailer hooked up on it and come to school.
i hate my YYS school.
by can.i.please.get.a.waffle October 13, 2019
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Acronym for "yeah, why?"
Laura texted David if he was busy right now. David replied with a "YY?"/
by Shvu Besheket September 18, 2018
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