The Collaborative International Dictionary of English v.0.48:

Fruit'y \Fruit'y\, a.
   Having the odor, taste, or appearance of fruit; also,
   fruitful. --Dickens.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fruity
    adj 1: tasting or smelling richly of or as of fruit
    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, nutty, round the bend, around
       the bend, wacky, whacky]