To contribute to a fund, esp to put what one owes into the pot of a card game (1940s+ Poker)
Idioms and Phrases with feed the kitty
feed the kitty
Contribute money to a pool or reserve, as in I can't make a big donation this year, but I'm willing to feed the kitty something. This term, originating in gambling, incorporates a pun, since kitty can mean “cat” as well as “pool.” [ Late 1800s ]