A member of the mint family of plants (aka catmint), Nepeta cataria.

Irresistable to cats, its mildly stimulant properties can trigger a large range of behaviors that can be collectively described as 'flippy' but also happy.
If cats had dealers, they'd buy catnip.
by xyz April 19, 2005
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Cheap,affordable, yet not as strong as weed.You can smoke this stuff. it won't get you high though.it will only relax you and make you want to sleep.
me and my friend smoked some Catnip in his room and then listened to Nine Inch Nails.
by iwannabeanalcoholic August 27, 2004
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-"dude, what's up with your cat?"
-"Oh, he's just high off that catnip I got him"
by harvey45 January 2, 2009
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A young male who is irresistible to older women, specifically cougars.

Catnip makes cougars go crazy until they lose all of their inhibitions and have to have the catnip at all costs.
Damn that smoking hot cougar bitch couldn't keep her hands off me. She must think I'm some high-grade catnip.
by Catnip69 July 28, 2010
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What to say when people ask what that bag full of weed is.
Hey what's the stuff in that bag?
Oh just some catnip for the cats...
by Nimh Trees October 11, 2005
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"I just gave my cat some catnip, and now she won't stop running around the house."
by Elastico March 15, 2010
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weed for cats, and including the slang terms: the temp, sanyo, cat-juice, jenga, hard rock, printing, bottling, on the chips, glittering, E-ing, snowballing, Oprah Winfrey, and lidd nipping
Guy1- dude my cat was totally oprah winfreying on the sanyo yestersday.
Guy2-really how bad?
Guy1-yah he was e-ing all over the place after that catnip i got him.
by the lidd nipper December 4, 2009
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