The Collaborative International Dictionary of English v.0.48:

Salty \Salt"y\ (s[add]lt"[y^]), a.
   1. Containing salt; tasting of salt; saltish; as, the salty
      sea; the potatoes are too salty.
      [1913 Webster + PJC]

   2. Interesting and witty; piquant; -- of discourse.
      [PJC]

   3. Racy; sexually suggestive; -- of discourse.
      [PJC]

WordNet (r) 3.0 (2006):

salty
    adj 1: engagingly stimulating or provocative; "a piquant wit";
           "salty language" [syn: piquant, salty]
    2: containing or filled with salt; "salt water" [ant: fresh,
       sweet]
    3: one of the four basic taste sensations; like the taste of sea
       water

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "salty":
   Attic, biting, blue, brackish, brilliant, briny, broad, clever,
   droll, facetious, funny, humorous, humorsome, jesting, jocose,
   jocular, joking, joky, joshing, keen, keen-witted, marine,
   maritime, mordacious, mordant, nautical, naval, navigational,
   nimble-witted, ocean-going, oceanic, off-color, pelagic, pickled,
   pointed, pungent, purple, quick-witted, racy, rapier-like, risky,
   risque, saline, salt, salted, saltish, scabrous, scathing,
   scintillating, seafaring, seamanlike, seamanly, shady, sharp,
   smart, sparkling, spicy, sprightly, suggestive, trenchant,
   water-borne, whimsical, wicked, witty