float someone's boat
float (one's) boat
To make someone happy. Often used in the phrase "whatever floats (one's) boat." A: "What do you want for dinner?" B: "Whatever floats your boat, I'm not even hungry." I think this new job in the lab will really float Isabel's boat.
float someone's boatINFORMAL
If something floats your boat, you find it exciting, attractive, or interesting. Create a space for yourself: light candles, burn incense, run a bath — whatever floats your boat. I can see the band's appeal. But it doesn't float my boat.