Firstly a man must stick his own index finger into his pee hole up to the first knuckle. Then slowly remove index finger and insert a lit cigarette (filter first). Quickly begin to have rigorous and sweaty buttsex with another man. If the cigarette falls out of the first mans pee hole the partners must then switch positions. This act continues until either a.) You use an entire pack of cigarettes or b.) you ejaculate onto cigarette. If scenario b occurs the ejaculator then makes the other partner smoke the cum drenched cigarette.
It took Matt and Dave 4 hours to finish their Canadian Exhaust Pipe.
by BOATS! July 30, 2009
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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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This an act you do with your sexual partner with a vehicle, it's when your partner turns on a car, puts it in park and revs the engine as hard, whilst you insert your dick into the exhaust pipe and start fucking the car exhaust pipe while they are revving the engine causing your dick to burn
I heard Tyrone and baljiet did the exhaust piping!
by bigblackcockandballsinmynose December 30, 2020
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