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A phrase used to determine the appropriate circumstances under which to flush a toilet. Urine was to be left unflushed in the toilet bowl while feces were to be flushed right after bowel evacuation. This was used in efforts of water conservation either in the sense of environmental conservation or the saving of clean toilet tank water during power outages in remote areas.
“Man, don’t waste three gallons of water to get rid of a cup of sterile piss.”
“Why is that kindly hippy?”
“Just remember man, 'If it’s yellow, let it mellow. If it’s brown flush it down.'”
Thank you, sir. Perhaps with the water we save in the crapper you might be able to bathe more thoroughly in the future.”

If it's yellow, let it mellow. If it's brown, flush it down
by Capt. Chunkstyle June 5, 2006
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Well it was fukin' one of ya's

"Who didn't flush da godd damn toilet.
It wasn't me.
Well it was fukin' one of ya's!"
"Who didn't flush da godd damn toilet.
It wasn't me.
Well it was fukin' one of ya's!"
by YoungDanielzzzYeezy's July 21, 2019
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get flushed down a toilet and come out in a new suit

1. A person who "looks" wealthy, acts wealthy and most people think he is wealthy but in reality it's all pretend.

2. A person who "looks good" no matter what they do. They come out on the winning end all the time.
He's so smooth and such a player he could get flushed down a toilet and come out in a new suit!
by Dottie Blitz April 5, 2016
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wasn't me
well it was foocking one of yaz
DISGUSTANG
why doesn't somebody not know how to flush a toilet after they've had a shet- youtube
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Courtesy Flush

Courtesy Flush: When you are with someone in a tight space or tight hotel room or on a bus or a plane, it's a courtesy to flush when the tip of the brown torpedo hits the water.
If you have to do a #2, can you please grant me a Courtesy Flush or a few courtesy flushes.
by Just havin a little fun June 21, 2025
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Royal Flush

When all the siblings in a family are queer.
Did you know that Sarah and her sister are both queer? That’s a Royal flush!
by PercyWercy April 5, 2023
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Royal flush

A group consisting only of people on the asexual spectrum
"I don't think you should be hitting on them, they look like a royal flush."

"This is a royal flush household and thus sex is frowned upon."
by desertedsilk June 11, 2022
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