too good to be true

too good to be true

1. (idiomatic) Appearing to be exceptionally good, and therefore arousing suspicion of illegitimacy.

   He wants to give you two million dollars? That's just too good to be true!

   • 2021 December 1, Nigel Harris, “IRP snuffs out 'levelling up'”, in RAIL, number 945, page 3:

     Remember the old saying that if something looks too good to be true, then it almost certainly is?

• too good to last

• cognitive bias

• “too good to be true”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.