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1.
cafeing is when someone laughs or breathes into a bowl or other smoking device resulting in the weed and ashes to be blown all over.

also when someone drops your weed on the ground.

also can be noun "cafer"

or verb "cafe" "cafed"

pronounced "kayf"
example 1
guy #1 drops bag of weed on ground while taking a hit.

guy #2 "Dude why are you always cafeing with my weed?!"

example 2
guy#1 tells a funny joke

guy#2 laughs and blows weed out of bowl

guy#1 Dude why do you always cafe in my car?
by Deadmoose August 29, 2009