Devil-may-care and Self-indulgent

Devil-may-care adjective - Having a relaxed, casual manner.

Self-indulgent and devil-may-care are semantically related. In some cases you can use "Self-indulgent" instead an adjective phrase "Devil-may-care".

Self-indulgent adjective - Given to or marked by excessive gratification of one's desires.

Devil-may-care and self-indulgent are semantically related. Sometimes you can use "Devil-may-care" instead an adjective phrase "Self-indulgent".