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A slight variation of the word 'Jackass'. Made popular in northern California.
"That guy is such a Jackey, all he does is poke fun at peoples flaws"
by Todd W. Thompson April 06, 2008
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2
Verb. Weather that is chilly enough to require a jacket.

Word originated from an aging rapper in a Chicago circa 2008
Hmm. I thought it was going to be warm today but it’s actually quite jackey outside.
by AwesomeJones November 23, 2018
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