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One of any number of contagious diseases transmitted through the use of marijuana paraphernalia.
David entered the rotation with a cold, and now we've all got bong flu.
by dee voyst January 17, 2006
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2
the sickness that one acquires when sharing a joint, pipe, bong, or any other smoking appliance with a group
"Yo are you coming out tonight?"

"Nah sorry, I got a came down with a wicked case of bong flu last night at the hotbox."
by Cheif Queef November 28, 2016
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