terd bird Share definition Flag A bird found in the earth's core. It is coated with blackish-white feathers and takes a dump every 22 seconds. One day, I will dig down to the earth's core and eat me a terd bird. terd bird by Jonny Livestrong February 6, 2005 0 0 Get merch Get the terd bird mug. Buy Now — $32.95 See more merch