Similar to a rusty trombone except one, both or all of the participants vomit which is then eaten by the other participants and used as lubricant for more rusty tromboning
Randy: Dude did you go home with that elderly couple last night?
Chet: Yeah, I went back to their house, things got pretty heavy we ended up finishing the night with a round of Rusty Yaks.
Or
Randy: dude you and Sarah were pretty loud last night in your tent.
Chet: yeah, Sarah was giving me a rusty trombone but on day 5 of camping things were pretty rank back there and she yakked, so we made the best of a bad sitch and turned in into a Rusty Yak.
When you’re doing anal and the person receiving lets out a big fart around your dick
I was banging this chick in the ass last night and she had bad gas. Gave her the ole rusty muffler
The act of slurping tomato juice from a gaping vagina.
John gave cindy a Rusty Mary last night
The act which normally partakes in the process of having sexual intercourse with a woman on top where she leaves a trail of feces on her partner's stomach.
She was really good in the sack but left me a Rusty Rail.
when an older gentleman has sex but his spray on tan rubs off on the bed sheets
watch out for randy, I hear he's a real rusty grandpa
Aka a Brass Section, when you get a bunch of people together and have them compete for who gets to be first rimmer on an asshole
I thought it was just going to be a gang bang but they all lined up like it was try outs like a goddamned Rusty Crowder
When you slip your balls in your old rusty grandmas pussy.
Man that grandma looks like I need to rust her pussy up with an old fashion rusty bolder.