Source : Webster's Revised Unabridged Dictionary (1913)

Nutty \Nut"ty\, a.
   1. Abounding in nuts.

   2. Having a flavor like that of nuts; as, nutty wine.

Source : WordNet®

nutty
     adj 1: having the flavor of nuts; "a nutty sherry" [syn: {nutlike}]
     2: informal or slang terms for mentally irregular; "it used to
        drive my husband balmy" [syn: {balmy}, {barmy}, {bats}, {batty},
         {bonkers}, {buggy}, {cracked}, {crackers}, {daft}, {dotty},
         {fruity}, {haywire}, {kooky}, {kookie}, {loco}, {loony},
        {loopy}, {nuts}, {round the bend}, {around the bend}, {wacky},
         {whacky}]
     [also: {nuttiest}, {nuttier}]