GOOK

sludge, slime, goo, goop, gook, guck, gunk, muck, ooze

(noun) any thick, viscous matter

Source: WordNet® 3.1

Etymology 1

Noun

gook (plural gooks)

(slang, vulgar, derogatory, offensive, ethnic slur) A person of Far Eastern or Oceanian descent, especially a Vietnamese, Filipino, Chinese, Japanese or Korean person.

(US, derogatory) A Vietnamese insurgent in the Vietnam War, particularly a member of the Viet Cong.

(dated) A foreigner, especially an enemy soldier in wartime.

(Rhodesia, derogatory) A black insurgent in the Rhodesian Bush War.

Usage notes

• In the US, gook refers especially to a Vietnamese person in the context of the Vietnam War, and particularly to the Viet Cong. It is generally considered to be highly offensive, on par with nigger.