monster of the month Share definition Flag Usually reffering to the ''whore of the month''; the girls EVERYONE'S fucking. James: Hey look, its Mary. Jessica: She's the Monster of the Month. Fucked her twice. monster of the month by heatherrrrr. June 18, 2008 0 0 Get merch Get the monster of the month mug. Buy Now — $32.95 See more merch