What is the origin of the idiom "feed the kitty" and when to use it?

The origin of the idiom "feed the kitty" can be traced to gambling and betting practices, particularly in card games, where players would contribute money to a central pot called the "kitty." By feeding the kitty, players would add funds to the collective pot, ensuring that there was enough money for future bets and winnings. It can be used in various situations where individuals are discussing the need for financial support, donations, or investments.