THUNDERCATS HOOOO! Share definition Flag A yell of a once popular cartoon character. Also fun to yell while running around in a supermarket. This looks like a job for...THUNDERCATS HOOOO! THUNDERCATS HOOOO! by wAsTe June 17, 2004 0 0 Get merch Get the THUNDERCATS HOOOO! mug. Buy Now — $32.95 See more merch
