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
Rajko	-	Croatian
Kirke	-	Greek Mythology
Jaqueline	JAK-ə-leen (English), JAK-ə-lin (English)	English (Modern), Portuguese (Brazilian)
Lennie	['leni]
Visvaldis	-	Latvian
ZsÓFika	ZHO-fee-kaw	Hungarian