Definitions of kitty:

• noun:   informal terms referring to a domestic cat
• noun:   young domestic cat
• noun:   the combined stakes of the betters
• noun:   the cumulative amount involved in a game (such as poker)
• name:  A female given name (rare: 1 in 12500 females; popularity rank in the U.S.: #987)
• name:  A surname (very rare: popularity rank in the U.S.: #82897)