Green’s Dictionary of Slang

(US black) a black child.

1999		D. Looser ‘Boob Jargon’ in NZEJ 13 33: niglet n. A dark skinned child.
2000		Ebonics Primer at www.dolemite.com 🌐 niglet Definition: negro offspring. Example: Jamal, hunny, come gits in bed, cuz da mo niglets we gotz, da mo welfare we gitz!
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 124/1: niglet n. a dark-skinned child.