a mug's game
US /ə mʌɡz ɡeɪm/
UK /ə mʌɡz ɡeɪm/

1.
un juego de tontos, un esfuerzo inútil
an activity or situation that is likely to be unsuccessful or to cause problems for the person involved
:
•
Trying to get rich quick is often a mug's game.
Intentar hacerse rico rápidamente es a menudo un juego de tontos.
•
He realized that betting on horse races was a mug's game.
Se dio cuenta de que apostar en carreras de caballos era un juego de tontos.