more fool you, them, etc.

more fool (one)

An expression mocking a decision or action that one thinks to be particular stupid or foolhardy. If you give money to Jeremy and expect him to pay you back, then more fool you. A: "So, you sold your car and bought a nice bike, but now you're moving to the middle of the countryside?" B: "I know, more fool me."

ˌmore fool ˈyou, them, etc.

(spoken) (used as an exclamation) you, etc., were very foolish to do something: ‘He’s not going to accept that job in Vienna.’ ‘More fool him. He’ll never get another chance like that again.’