hacksawing
Using your teeth to give a blowjob so bad it feels like you're eating a piece of old pizza.
My cousin tried to give me a blowjob and just gritted her teeth the whole time. I almost choked on her bad breath.
My boyfriend's teeth are like a rusty hacksaw. I've been hacking away at his mouth for weeks.
My ex used her teeth to give me a blowjob. I swear I could've cleaned my teeth with her breath.