Originally a naval expression. It means stop talking and be quiet. The Pipe Down was the last signal from the Bosun's pipe each day which meant "lights out" and "silence".
You better pipe down when she's talking to you!
by martini February 03, 2005

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Top Definition
basically telling someone to shut up.
"hey you over there, pipe down"
by Anonymous July 06, 2003

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A uncomplicated and cutting expression, which plainly means "Shut the Fuck Up"
"My fiancee is demanding I go to bed before 12"

"Tell the bitch to pipe down..."
by MikeWain September 01, 2008

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verb. To lower one's voice; to stop yelling, whining, complaining, etc. To partake of marijuana utilizing a pipe or bowl.
1. "Pipe down over there! We've heard enough of your bitching and complaining all fucking day today."
2. "You kids better pipe down, or else when your father gets done with his phone call, he's gonna be whooping some little asses!"
3. "Hey bro, meet us behind the shed in like 30 minutes man.....me and Mike are gonna 'pipe down' on some cronic dude ...."
by JKong October 01, 2013

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Another way of saying "be quiet" or "shut up", except it is more firm and usually more effective.
Tina: Parker, PIPE DOWN! I am trying to do my homework!
Parker: No Tina, YOU pipe down! I am too busy being crazy and getting turnt!
by The_Tru_Baller January 17, 2016

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To fuck another person. This is a spin of lay the pipe, but in a much more poignant manner.
I was piping down this bitch last night when, all of a sudden, her roommate walked into the room. Then I piped her down too.
by Nautilus January 25, 2005

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v. to have sexual intercourse with a female
I piped down this chick last night for three hours.
by Nautilus February 16, 2005

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