Herman the one-eyed German Share definition Flag A penis. Whimsical term for the male sexual member. I hope Herman the one-eyed German isn't planning a visit tonight - I'm tired and have a headache. Herman the one-eyed German by Rod Brock September 24, 2005 0 0 Get merch Get the Herman the one-eyed German mug. Buy Now — $32.95 See more merch