i couldn't give a rat's ass

I don't care.

I couldn't give a rat's ass about birthdays.

by PA McFalls January 19, 2016

i couldn't give a rat's ass

An expression meaning I couldn't care a less or give a shit about something.

Worker: "I was late to work because my car broke down goddamit!"

Boss: "I couldn't give a rat's ass if you got anally raped this morning! You're fired!"

by Human Pickled Punk May 7, 2016