Ultra Mega Chicken is a massive, legendary chicken featuring horns, fangs, and (for some reason) jet engines.
Its sole appearance is in the episode "Video Ouija", after being unintentionally summoned by Frylock using BillyWitchDoctor.com's chicken-summoning staff while trying to bring Shake back from the dead.
His efforts prompt Ultra Mega Chicken to fall out of the sky, crushing Carl to death under his talons, and prompting Meatwad to ask if he can go ahead and let go of Carl's (severed) hand.
Trivia
- BillyWitchDoctor.com mistakenly calls him "Mega Ultra Chicken" in the beginning of "Video Ouija".