Niagara Nostril Share definition Flag When you moisten your finger with saliva and stick it in another’s nostril. “Dude, I just gave Chedda the ol’ niagara nostril on the bus.” Niagara Nostril by CheddyBombs27 April 4, 2024 0 0 Get merch Get the Niagara Nostril mug. Buy Now — $32.95 See more merch