The Collaborative International Dictionary of English v.0.48:

Kitty \Kit"ty\, n.
   1. A kitten; also, a pet name or calling name for the cat.
      [Webster 1913 Suppl.]

   2. [Etym. uncertain.] (Gaming) The percentage taken out of a
      pool to pay for refreshments, or for the expenses of the
      table; by extension, any pool of money aggregated from
      small contributions. --R. F. Foster.
      [Webster 1913 Suppl. +PJC]

WordNet (r) 3.0 (2006):

kitty
    n 1: the combined stakes of the betters [syn: pool, kitty]
    2: the cumulative amount involved in a game (such as poker)
       [syn: pot, jackpot, kitty]
    3: young domestic cat [syn: kitten, kitty]
    4: informal terms referring to a domestic cat [syn: kitty,
       kitty-cat, puss, pussy, pussycat]

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "kitty":
   Cheshire cat, Chinchilla cat, Maltese cat, Swiss bank account,
   alley cat, assets, balance, bank, bank account, blue cat,
   bottom dollar, budget, calico cat, cash reserves, cat,
   checking account, collection, command of money, exchequer, feline,
   finances, fund, funds, gib, gib-cat, grimalkin, house cat, jackpot,
   kit, kitling, kitten, kitty-cat, life savings, means, moneys,
   mouser, nest egg, pecuniary resources, pocket, pool, pot, purse,
   puss, pussy, pussycat, reserves, resources, savings,
   savings account, silver cat, stakes, substance, tabby, tabby cat,
   tiger, tiger cat, tom, tomcat, tortoise-shell cat, treasure,
   unregistered bank account, wherewithal