rusty train
When you shit in someones mouth, then receive a blowjob from that person.
"Man, she sure gives a mean rusty train."
Rusty Train G Thang
When Snoop Dog and Dr. Dre roll up your bitch and your girl eats Snoop's ass while Snoop gives Dre a rusty trombone.
"Ay yo Snoop want to go run a Rusty Train G Thang on that guys bitch"