What is Mon Keigh?
1.
A racial slur used by the Elf-like Eldar in reference to Humans in the grim darkness of Warhammer 40,00. In Eldar tongue, it means "Those who must be Exterminated." It also sounds like the word monkey.
You... You... DOUBLE MON KEIGH
Or
The Mon Keigh world is heavily defended. We shall launch the assault at daybreak.
See