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The situation in which you hit the bong and suddenly one of your nostrils becomes clogged, yet you cannot blow anything out your nostril to clear it. Long term bong use can lead to more frequent bong nostril flare-ups.
Jon: Sniffles

Joe: Dude are you sick?

Jon: Nah man, just got some bong nostrils.
by Bongitis December 29, 2011