example 1 (disguising fault):
“Your slanderous article has ruined my good name! I demand that you retract it.”
“Not my problem.”

example 2 (not one’s fault):
Right as I was leaving the building after quitting my sysadmin job, I heard the servers go down again. I didn’t turn back. It was not my problem any more.

Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak

Sheila: "You used all the gas in my car! How do you expect me to get to work?!"
Jared: "Not my problem."

"Not my problem!"

a: My girlfriend has run away with some shortarse, chav gobshite from Chelmsley Wood! What should I do?

b: Not My Problem....