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Annoying, very annoying, increasingly annoying. Comes from the mathematical term "gradient": The maximum/greatest rate of increase of a 3D slope.
He was the most gradient person in class.

annoying, asshole, jirk, clown, idiot, moron, imbecile
by Dogbone Woofer November 20, 2012
another word for the drug cannabis
"im gonna get abit of gradient tonite you in?"
"yea sure"
by siq_steve February 06, 2008