Rusty Butt
When a person does not wipe there ass well after taking a shit. This either results in a rash or you will end itching you ass crack for hours.
friend: Why you wigglin on the couch?
you: Man Ive got some crazy rusty butt.
you: Man Ive got some crazy rusty butt.
Rusty Butt Chug
The act of peeing into someones butt
Would you like to have a rusty butt chug later?
Rusty coke butt
When you put it in someone's butthole and pullout and they proceed to do a line of cocaine off of your shit covered dick
Guy: hey I heard you hooked up with Katie d
Me: yeah we did a rusty coke butt
Me: yeah we did a rusty coke butt