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4.
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
182 177
 
1.
basically telling someone to shut up.
"hey you over there, pipe down"
by Anonymous July 06, 2003
232 36
 
2.
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
219 68
 
3.
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
10 3
 
5.
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
79 154
 
6.
v. to have sexual intercourse with a female
I piped down this chick last night for three hours.
by Nautilus February 16, 2005
75 154