I know it like the back of my ass
when you know something so bad it’s like you were raised by a butt inspection team. most people would rather get a tattoo than look at their own ass.
I know this song like the back of my ass. I’ve heard it so much I can sing it in my sleep and still get it wrong.
My grandma said she knows my life like the back of my ass. She’s never seen my life.
I know this test like the back of my ass. I’ve studied for it so much I’ve forgotten what I studied.