To have a rusty exhaust pipe is an expression which is usually used as an excuse to pardon one's own inability to keep one's anus clean/one's bottom shaved for pleasurable anal sex.
It can be said in front of one's partner both in a homosexual and heterosexual relationship.

However, the actual fact if the stated is really true or not is not important. The affected person is rather able to express himself/herself by using euphemistic vocabulary and thus without using derogative language.
Therefore, persons employing this excuse might also be trying to cover their sheer weariness or laziness to have anal sex with their partner for personal, moral or whatever reasons.

possible forms to say:
- to have a rusty exhaust (pipe)
- to suffer from a rusty exhaust (pipe)
- to have rust in one's exhaust (pipe)
(etc.)
"Come into the bed already, Antonia. I need you here urgently."
"Sorry, cutie, not this time. I've got rust in my exhaust."
"Awww..."
"Well how about a nice mouthfuck instead? You like that, don't you?"
"Good night, honey. I'll see you tomorrow."
"..."

"You know what to do. Lose your pants and bend over the table while I do some... doctorstuff there..."
"I'm sorry, Doctor Dawson, but my mother really wants me to get checked this time. I'm not here for...this again."
"You're kidding right? I'm already as horny for your little teen-ass as a prepubescent nerd for a skank in a homemade porn movie."
"...uhh also, I've got a rusty exhaust pipe back there."
"Here's your doctor's note. Now get outta here before I have second thoughts!"
by BulligerVerstand August 19, 2007
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When a guy puts his penis in his partner's unwashed anus and then promptly inserts said shit-covered penis into his partner's vagina.
Tommy: I think I might have another UTI, it hurts so bad when I pee.
Paul: I thought you were gonna stop covering your dick in shit Tommy, we talked about this!
Tommy: It's the texture Paul, I just can't get enough of the rusty pipes.
by Kim Jong Poo August 11, 2022
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Whiskey and tonic, prepared in the same ratio as a gin and tonic.
Would you like a glass of rusty pipe water?
by MrJuly October 11, 2011
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The act of urinating inside his/her anus and they stand up and let it drain on you.
Last night, Stacy gave my a rusty drain pipe.
by Buccos26 December 9, 2018
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