me importa un comino

I don't care at all

→ me
phrase Rare #43,142
I don't care at all An informal idiom expressing complete indifference. Despite the affirmative form of importa, the phrase means that something does not matter to the speaker.
SP: Me importa un comino lo que piensen los demás.
EN: I don't care at all what other people think.

Me importa un comino.

I couldn't care less.

No me importa un comino.

I couldn't care less.

Me importa un comino estar a la moda.

I couldn't care less about being fashionable.

— La vida de Adèle (2013)

Me importa un comino si Tom viene o no.

I couldn't care less whether Tom comes or not.

Me importa un comino la humanidad.

I couldn't care less about humanity.

— Stalker (1979)