Ajax the Gorilla is an angry gorilla and the main antagonist of the Disney cartoon show Donald Duck and the Gorilla.
In the short, the gorilla escaped from confinement and found its way to Donald's house. Before that, Huey, Dewey, and Louie were attempting to scare Donald by dressing up as Ajax. Unfortunately, the prank took a turn for the worse when the real gorilla actually showed up. Donald, unaware that the gorilla was real, mistook it for the boys only to realize Huey, Dewey, and Louie weren't wearing the costume anymore. Enraged, the ape chased the ducks throughout the house. When it cornered Donald, however, the boys lauched tear gas into the room, causing both Donald and the gorilla to swell up in tears. They then both cry together as the short ends.