Sex Opossum Share definition Flag Its when you pretend to fall asleep to get someone to hurry up or to avoid sex altogether. This guy's cast stank so bad. So, I pretended to fall asleep to get him to stop or just finish up just like a Sex Opossum. Sex Opossum by Kudzu007 July 1, 2011 0 0 Get merch Get the Sex Opossum mug. Buy Now — $32.95 See more merch