moxin Ask Urban Dictionary about moxin Share definition Flag The act of halting the flow of effluence from the rear orifice using the fifth digit of the dominant hand. "I almost had to pull a Moxin, but made it to the bathroom in time" moxin by MM April 16, 2004 0 0 Get merch Get the moxin mug. Buy Now — $32.95 See more merch