'laid-back' originates from the English phrase 'laid back', where 'laid' is the past participle of 'lay', meaning 'to place or put down', and 'back' refers to a relaxed position.

'laid-back' evolved from the literal sense of 'laid back' to describe a relaxed demeanor.

Initially, it meant 'to be in a reclined position', but over time it evolved into its current meaning of 'relaxed and easy-going'.