If it's yellow, let it mellow. If it's brown, flush it down

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

If it's yellow, let it mellow. If it's brown, flush it down by Capt. Chunkstyle June 5, 2006

If it's brown, drink it down; if it's black, send it back.

A cautionary guide to the water of Springfield USA wherein residents such as the Simpson family reside.

Billy Corgan: Hey, Homer, looks like our next stop is your hometown, Springfield.
D'Arcy: Is it true that we have to bring our own water?
Homer: We got a little rule back home: if it's brown, drink it down; if it's black, send it back.

If it's brown, drink it down; if it's black, send it back. by -DF- May 6, 2009

Buck Bronson's Brown Eye Slider 

Term used to describe a dump, at least 6" in length, that moves slowly out of the ass and into the bowl, usually producing little to no sound and never any splashback.

Because it was a Buck Bronson's Brown Eye Slider, the poor soul in the next stall was unaware that Jim had taken a dump until it crept up his nose.

Buck Bronson's Brown Eye Slider by Ducati Jeff September 11, 2006

brown hatter's overalls 

Pajamas, as worn by many men up until the late 70's, when central heating in the UK was commonly installed in many homes.

Bob was wearing his brown hatter's overalls when I called 'round this morning

brown hatter's overalls by ward b July 6, 2007

Brown Man's Exit 

When you avoid an otherwise unavoidable instance of having to pay, at the last possible opportunity.

An unexpected hope when there shouldn't be, but only when the consequences are minor.

Cheap desperation is the crux of the "brown man's exit."

We could pay the toll or take the brown man's exit and find another way.

Brown Man's Exit by Nigel_Sinjinsmyte January 24, 2011

Nietzsche’s brownie

during anal intercourse when a partner starts exclaiming loudly or calling out “God!” it is met every time with the scream/war cry “GOD IS DEAD!” followed by a plethora of hard aggressive thrusts

As soon as Adam began exclaiming God, Gabe gave him Nietzsche’s brownie.

Nietzsche’s brownie by For TIMMAH! July 29, 2018

beaner's brownie 

when you are eating out a girl's asshole and it gets so intense that she shits all over your face, especially when she has diarrhea. you then take the shit and make it into a batter, and make brownies.

she beaner's brownied all over face

beaner's brownie by hoogalybear March 7, 2011