adjective
(archaic, also figuratively) Full of nits.
(chiefly British, slang) Foolish, inane.
noun
(African-American Vernacular, MLE, slang) A dope fiend, a druggie.
adjective
(Excessively) detailed or specific; fastidious, fussy, nit-picky.
(poker slang) Of a poker player: playing in an overly cautious and reactive manner.
adjective
(obsolete, rare) Shining; elegant, spruce.