not concerned about something; to show a lack of interest or care

completely unconcerned; showing a cold or detached attitude toward people or things

(idiom) a matter that does not concern one personally; to have no personal stake in something

unimportant or having no relevance to one's own interests; of no consequence; immaterial

of no importance or consequence; irrelevant

to be indifferent to matters that do not affect oneself; to feel unconcerned and let things slide or let matters rest