not have a care in the world

not have a care in the world

To not have any concerns or worries; to be happy and carefree. I miss the summers of my childhood, when I didn't have a care in the world. John looks so peaceful and contented, like he doesn't have a care in the world.
See also: care, have, not, world
Farlex Dictionary of Idioms.

not have a care in the world

Fig. free and casual; unworried and carefree. I really feel good today—as if I didn't have a care in the world. Ann always acts as if she doesn't have a care in the world.
See also: care, have, not, world
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

not have a ˌcare in the ˈworld

,

without a ˌcare in the ˈworld

not have any worry or anxiety at all: Sam looked as if he didn’t have a care in the world. She skipped along the road, without a care in the world.
See also: care, have, not, world
Farlex Partner Idioms Dictionary
See also:
  • happy-go-lucky
  • have a spring in (one's) step
  • with a light heart
  • have a light heart
  • a spring in (one's) step
  • Jack the Lad
  • a Jack the Lad
  • life isn't all rainbows and unicorns
  • life isn't all sunshine and rainbows
  • breeze in(to)