This is a word rooted in the many meanings for kush (refer wiki's Kush, kush, khush, kusher) that have arisen through history. Kushers are objects that mean different things to different people. Objects deemed as kushers usually provide happyness ('Khush' means 'Happy' in Hindi).

Objects may be Psychadelic (originating from the fact that kush is a very potent strand of marijuana). They may be violent (in a funny way). They could be awe inspiring or just interesting to the individual that deems the object a kusher.
Joe1 - 'Nice hat bro'
Joe2 - 'Yea its the only kusher that store had'

Jane1 - 'OMFG the fan glows as it spins?!'
Jane2 - 'Enough for you'
Jane1 - 'Ita kusherrrrr wooo'
by gib123 May 28, 2010
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A phrase to state that marijuana is good, or kosher, derived from the words: Kosher and Kush
"Yo is that weed straight?"

" Yeah, it's Kusher"
by mag1cm1ke November 9, 2014
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a careful kusher is someone who smokes weed but doesn't want everyone to know. they want to maintain a good reputation and actually care about morals, but they don't mind getting a little #baked every once in a while
"Do you know Alex?"
"Yeah, she's such a careful kusher."
by closetstonerJB September 8, 2016
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