mosfopper Share definition Flag when a guy sucks your dick so much your skin and his mouth turn white. last night when i was asleep my gay roomate gave me a mosfopper and when i woke up he already threw up eight times!! mosfopper by Shanekua thebikeman May 3, 2006 0 0 Get merch Get the mosfopper mug. Buy Now — $32.95 See more merch