A Unit of time measurement similar to normal time, however very flexible - something that Valve says might take a week could take a day, or something that they say might take a month, will take a year. Generally fluid.
Team fortress 2 players got the bad end of Valve Time when the pyro update was first announced, and got the good end of it when they fixed the infinite health glitch in record time after it was found.
by De Lumpdumper February 12, 2018
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The expanded time Valve uses when talking about anything that will involve them working. Like a new york minute, but in reverse. See Valve week and Valve month.

The conversion factor is approximately 2-6 times whatever the stated interval is.
Loose example of Valve Time from the Steam August 26 update news:

"Fans will remember that Blue Shift included a "High Definition Pack," a set of visually enhanced player and weapon models. We've had to iron out some technical wrinkles with how we deliver the HD Pack, but it will be made available through Steam within the next week or so."

As of November 20, 2005, this content still hasn't been released.
by Stuart P. Bentley November 20, 2005
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An interval of Valve time from 2 weeks to a month.
"Hey, DOD:S is going to be released next week!"

"But that's a Valve week. Expect it in September."
by Stuart P. Bentley November 20, 2005
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An extremely difficult sex act in which both partners mutually climax and mutually expel flatulence during the 69 sexual position.
Too much Taco Bell leads to some sloppy steam valving.
by The Haitian Hot Box February 22, 2011
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"Got this lady back to mine last night and I give her one right up the Clacker Valve!!!
by Bobbymoore May 8, 2010
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(n.)1. a system widely used in Europe to keep certain substances from touching the ground, floor, etc... As of 2009, has not crossed the pond to the United States.
(n.)2. a device able to modulate at low levels consisting of plastic (static free), paper like products (including post-it notes, legal paper, computer paper etc...) in a box or circular form. Used mainly to keep long, flowing objects in place (garland, tinsel, etc...).
1). Five different Italian families are believed to have invented the system know as the "modulator valve."

2.) "Wow", said Jane, "that modulator valve keeps the tinsel from hanging down and tree looks so much more beautiful."
by tttech guy7 December 2, 2010
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Used to describe a selfish person. Commonly used by navy machinists. If a person goes to a vending machine and doesn't ask anyone if they want anything.
"Hey shipmate, how's the soda?" Thank's for not asking me if I want anything. Fuckin' check valve."

"Hey look at that nub over there eating McDonald's. I'm not signing that check valves qual card."
by TorpMan, Submarines November 27, 2008
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