i dont give a dead mans last fuck
You're so done with everything that even the last fuck of a dead man isn't enough to make you care. You're like a zombie, no brain, no life, no fucks given.
My dad stole my phone. I didn't give a dead man's last fuck.
I got locked out of my house. I didn't give a dead man's last fuck.
My cat knocked over my soup. I didn't give a dead man's last fuck.