Source : Webster's Revised Unabridged Dictionary (1913)

Nitty \Nit"ty\, a.
   Full of nits. --B. Jonson.

Nitty \Nit"ty\, a. [L. nitidus. See {Nitid}.]
   Shining; elegant; spruce. [Obs.] ``O sweet, nitty youth.''
   --Marston.