Happy go lucky.

The phrase describes someone who is cheerful, easygoing, and inclined to take life as it comes rather than dwell on worries or make elaborate plans.

It can suggest an appealing freedom from anxiety, but may also imply carelessness when a situation calls for caution, preparation, or sustained responsibility.

Use it as an adjective before or after a noun, as in “a happy-go-lucky attitude.” Hyphenation is common before a noun. Tone and context determine whether it praises carefree warmth or mildly criticizes irresponsibility.