rusty tire

a sexual act similar to a rim job where your partner doesnt wipe there ass and the other partner eats there ass out when the shit is crusty

Girl:Hey can you give me a rusty tire
Boy:again

Rusty Tire

When you let poop crust on your butthole and girl gives you a rimjob. Causing the debris to fall into her mouth

Hey Ashley, I have not wiped in a couple of days. Would you like to give me a Rusty Tire?