F'ed in the A - A way of saying you're messed up and your butt is now famous

A way of saying you're messed up and your butt is now famous for being the worst.

I got F'ed in the A when I told my teacher my goldfish was a ghost.

My brother got F'ed in the A when he tried to prank his teacher.

My dog got F'ed in the A when it ate my homework.