mamiscus Share definition Flag Based on meniscus (from the Greek for "crescent"), the mamiscus is the bulge formed by a lady wearing a bra or low cut shirt that is too small to accomodate their ampleness. Did you see our waitress? She is sporting quite the mamiscus. mamiscus by jugggz May 13, 2011 0 0 Get merch Get the mamiscus mug. Buy Now — $32.95 See more merch