niggerlips
Noun
Meaning
(plural only, offensive, ethnic slur) Lips of a black person.
(plural only, offensive, ethnic slur, synecdoche) A person, especially a black person, with large lips.
Source: en.wiktionary.orgExamples
Ruth's nickname there was "Niggerlips", as he had large facial features and was darker than most boys at the all-white reformatory.