a retarded gorilla
Just one, but he has to see Radiohead do it first.
A finite number: one to perform the task and the remainder to act in a manner stereotypical of the group in question.
Brown-chicken-brown-coooow
A Lenintil...
Boko Harambe
Harambait.
Because it's Homo.
A retarded gorilla. (Can be modified to offend any nationality or group)