kitty
noun [ C, usually singular ]
informal uk/ˈkɪti/ usplural kittiesan amount of money that has been collected by a person or organization for a particular purpose:
a campaign/pension/retirement kitty
Fines are collected and the money goes into a kitty to be used for entertainment purposes at the end of the season.
in the kitty Five days into the project there was just £35 left in the kitty.