1. Jacking off to dispose of excess cum (if it has been awhile since you last fucked) 2. Jacking off earlier in the day when you will be fucking a hot broad later (in order to last longer)
Since I was seeing Jessica later, I performed a Cleaning Out the Pipes!
by MOCO & P-Phat February 11, 2007
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After ejaculating once, cleaning out the pipes is when he keeps fucking or wanking hard into another, weaker but still present orgasm, which doesn't expel any semen except that which was leftover in the penis from the original orgasm. Harder for those older, easier done by those you and testosterone filled.
Cool dude: "Man last night i was with mah girl and i came once, then i cleaned out the pipes and she loved it"

Lame dude: "Yeah, I cleaned out the pipes too, but I was alone..."

Other dude: "I heard about some guy in ST. Louis cleaning out the pipes, i heard he could do it twice in a row!"

by The ultimate pipe cleaner August 10, 2006
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-a more sophisticated way of saying "sucking him dry". Basically, men are continually producing semen, and after several days the urge to cum becomes unbearable. So his gf/wife makes him ejaculate via fellatio/intercourse (the ejaculation is often both powerful and plentiful), then blows him for several more minutes, sucking out the rest of his love juice and swallowing it. The last steps are highly recommended to insure he is completely dry and empty.

-"Pipes" refer to the long, twisting canals of the interior male genitalia.
Daniel had gone to the East Coast to visit grad schools and did not get a chance to masturbate even ONCE during the trip. When he got back to Berkeley, Jamie, his fiancee, sensed he needed to shoot badly so she sat him down and immediately got to work cleaning out his pipes.
by G-Fang August 20, 2007
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the period after a heated fight that results in angry flatulence
Last night after my girlfriend broke up with me I attempted to batter her with malicious words, but abrubtly began cleaning out the stove pipe which stench from the chinese dinner I enjoyed earlier with an asian prostitute, forcefully removed her.

"God damn you!" blblblblblblb!!!!
by papa sutra February 26, 2010
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That First big gutteral fart after taking a poop, meaning you didn't leave anything left in your bowels for the day.
AGHHHHHHH!!! Damn I just cleaned out the pipes after that loud fart! feel 10 lbs lighter!
by April 15, 2022
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