devil-may-care

Translations
беззаботность
His devil-may-care attitude often got him into trouble.
Его беззаботное отношение часто приводило к неприятностям.
Definitions
An attitude or behavior that is carefree, reckless, or unconcerned about the consequences of one's actions.
Words
devil

noun
дьявол
may

functional word
может
care

verb
заботиться