short for certified. When someone or something is really cool
My friend can do a back flip. That is so "Certi"
by D_MANLYK June 1, 2017
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certi si basically the short way of saying certified
A: see Nathan and Rachel have been dealing for 3 years and they haven't cheated on eachother
B: rahh they're relationship is certi
by Teddz Ldn April 4, 2015
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British slang. Short for certified, means “cool” or “sick”.

Similar meaning to other British slang terms ‘sweet as’ or ‘sound’
Mark: “i’m gonna bun in my gaff when the missus is out if you’re up for it”
Philip: “yes mate that’s certi”
by ahj03 September 17, 2021
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A man with the power to give titles on GWJ. He also seems to have an afinity for womens underwear.
by KrazyTaco[FO] February 15, 2005
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Shortened phrase replacing certified
by Alittleawkward January 27, 2017
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Urban word for describing someone who is authorised or has experience in the streets.
“My resume is still certy
by KingKong65 February 22, 2021
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another way to describe the music made by a vintage rock band called queen.
Freddie Mercury made a certi song today.
by good old fasioned lover boy March 27, 2019
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