British slang for "insane". Derived from "certifiably insane".
The evil genius villains in James Bond movies appear to be highly intelligent when, in actuality, they are certifiable.
by Li'l Scotty October 8, 2005
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something that has been found to be of high quality, something that is both excellent and somewhat esoteric.
the doom band brien just started is fucking certified.
by Reincremation July 29, 2006
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to be absolutely ON ONE. Just generally trippin', tweakin' out, jacked up, or crazy. Not necessarily due to drugs.
Could also mean on the right amount of drugs and alcohol to be on a whole new social level of whacked out.
Or a legit crazy person.
“You see Dukes rip his shirt apart on the dance floor when 0 to 100 came on last night? Homeboy was certified.”

"Wow. Jessica getting jealous of Nick and Sarah when she's not even hooking up with him. Certified."
by Trillbo Baggins February 11, 2015
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(adj) Completely NUTS. Past the point of "ticking". Ready to flip OUT.
Oh shit! That chick's been off her meds for a few days now! She's certifiable!
by starlight88 February 4, 2010
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Certified is a street gang created by Lp certifiedbased in Durham, North Carolina. But quickly spread to the west coast and is currently world wide. They have been moving under the radar in silence since 2003 but off and on over years been exposing there true nature to public eye.
On certified we get it roxin foo
Certified 3's up
by Hellstorm666 June 15, 2019
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1.de-virginitized
2.completed sex-ed(sexual education)
3.approved of not being terrible in bed
"My boyfriend certified me."
"I am certified in sex-ed."
"I think YOU're the one that has to certify ME.
by lindsey June 5, 2003
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Exactly what topsmuttjay is at Eating the a.k.a punanie
Eating a girl till she cry certified
by Playboi khai May 7, 2019
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