clean up on something
clean up on (something)
To obtain a lot of earnings, winnings, or desired goods (most often money) from a particular venture or action. I'm buying you dinner because I really cleaned up on chips at the poker game last night! If our little invention gets mass-produced, we'll clean up on cash!
clean up (on something)
in. to make a lot of money on something. If we advertise, we can clean up.