moobaaquack Share definition Flag The sound that a cow, a sheep and a duck make when in close proximity of eachother. Cow: Moo! Sheep: baa! Duck: quack! The result: Moobaaquack! moobaaquack by Joshage January 13, 2008 0 0 Get merch Get the moobaaquack mug. Buy Now — $32.95 See more merch