down the tube

down the tube(s)

Awry; in a state of deterioration or failure. You got a C average? Boy, your grades have really gone down the tubes this semester. We had big plans for our trip, but the terrible weather made it all go down the tube.
See also: down
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

down the tube (or tubes)

lost or wasted. informal
2001 High Country News I've already lost my alfalfa crop; that's about $20,000 down the tubes.
See also: down, tube
Farlex Partner Idioms Dictionary © Farlex 2017
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References in classic literature ?
Maston knew no bounds, and he narrowly escaped a frightful fall while staring down the tube. But for the strong hand of Colonel Blomsberry, the worthy secretary, like a modern Erostratus, would have found his death in the depths of the Columbiad.
Castor oil is thick and won't run down the tube so you need a large (140 cc) syringe to force the warm oil (mixed with a little warm water) down the tube.
Zamrud also requested the court to ensure the supply of water via alternate channels before shutting down the tube wells.
Slimming down the tube shape, the new REACTO is now more aero, and 17.13% lighter than the old version.
Carter then introduced the rest of the award-winners down the tube as they came on to stage.
Members of four unions walked out for the second time last week, closing down the Tube system, causing travel chaos.
So Abid Fahed had his sights set on a proposed drama 'Al Malik Al Namroud', but when that project went down the tube, he quickly switched gears to get the ball rolling alongside Lebanese lovely Nadine Njeim in a Lebanese drama titled "Law" (If) with producer Sadeq Al Sabah.
In order to calm down the protesters, Wasa closed down the tube well on the pretext that dust is mixing in the water due to underground land sliding and water supply will be resumed within two days.
Sixty fund managers under shortterm pressures sealed the fate of Cadbury's pounds 11.7 billion takeover by Kraft, sending "180 years of history down the tube", a new book reveals.
On Sunday, Randi Zuckerberg, the sister of facebook founder Mark Zuckerberg and director of market development at the social networking giant told delegates at GITEX in Dubai that: "Privacy is the number one most important thing for facebook" and that "the second we violate that trust our business is down the tube".
* OVERTAKE A LEAK: If you suspect the tube is leaking, fill a spray bottle with soapy water and wet down the tube after removing the cover.
I can tap the star and pad back down the tube, but I don't think it will stay.
If the input voltage doesn't stay within its specified range, the tube may not light up due to a too low input voltage insufficient to start up the tube successfully or may flicker on and off due to a too high input voltage setting off the inbuilt Over Temperature Protection (OTP) to shut down the tube at a relatively high temperature as well as starting up the tube at a relatively low temperature automatically.
When the dryer is turned on, the fan forces warmed air down the tube and out of the air jets.
According to her, the stand makes it easy to tap down the tube to keep air bubbles out.