mooloo Share definition Flag Same thing as saying "whatever" or "meh". Usually a random saying. Most likely to say it when one's bored/ tired. Person: So what do you want to do now? Go somewhere, play a sport..... Me: Mooloo. :P mooloo by tit slip pro January 1, 2012 0 0 Get merch Get the mooloo mug. Buy Now — $32.95 See more merch