mono bait Share definition Flag Any girl or guy who has sores around their mouth, possiby acne, and looks the part. "Hey Sam, that girl has a nice body, why don't you give her a try"? "Naw, chk out her face, definitely mono bait." mono bait by penis1foot January 26, 2014 0 0 Get merch Get the mono bait mug. Buy Now — $32.95 See more merch