a mug's game

(British informal)

an activity that will not make you happy or successful

Usage notes: A mug is a person who is easily deceived.

Working for a big company is a mug's game - if you want to make money you need to start your own business.

Name	Pronounced	Usage
Devan	DEV-ən	English (Modern)
Jessamyn	JES-ə-min	English (Rare)
Nada (1)	-	Arabic
Walter	WAWL-tər (English), VAHL-ter (German, Polish, Italian)	English, German, Swedish, Norwegian, Danish, Polish, Italian, Ancient Germanic
Faithe	FAYTH	English (Rare)
Iudicael	-	Ancient Celtic