When a person is so UGLY that the best creature that comes close to their looks would be crossed between SOMETHING with a momma goat and a daddy monkey.
Oh my, I know he is not coming over here to talk to me!! I wonder who let that GOAT MONKEY out the zoo?
The offspring of a musclebound mountain goat who had the misfortune of being raped by a monkey.
i.e. shoot that fucking monkey its molesting my goats.