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Webster 1913 Edition

Adj.

Full of nits.

B. Jonson.

Adj.

[L.

nitidus

. See

Shining; elegant; spruce.

[Obs.]

“O sweet, nitty youth.”

Marston.

Adj.

[from nit.] Full of nits; abounding with nits.

nitty ‎(comparative more nitty, superlative most nitty)

(obsolete, slang) Shining; elegant; spruce.
- Marston
  O sweet, nitty youth.
Full of nits.
(Can we find and add a quotation of Ben Jonson to this entry?)