yeetus Share definition Flag A yeetus is a baby whose father leaves it. It is a combination of the word fetus and yeet, because the father says yeet. "Aw, where's the father at?" "Oh, Little DaQuan is a yeetus..." yeetus by ThundaWaffle February 17, 2017 0 0 Get merch Get the yeetus mug. Buy Now — $32.95 See more merch