L5
The L5 bone is the biggest and lowest in your back. It's so big and low, people call it ‘ass’ when they can't say bad words.
My teacher said I got an F because I used the word ‘ass’ on the test. I said it was the L5 bone and she gave me a D.
My brother called me ‘L5’ in front of my mom. I got grounded for a week.
At school, I told my friend the L5 bone is the ‘ass’ bone. He laughed so hard he fell out of his chair.