mellow

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

If there is only urine in the toilet, do not flush it. (But if there is feces in it, then do flush.) A common mnemonic used as a way to reduce water usage in places with indoor plumbing. We have a pretty restricted water supply out here, so always remember—if it's yellow, let it mellow. If it's brown, flush it down. Due to the drought, households and businesses around the state are being encouraged to adopt an "if it's yellow, let it mellow" policy.
See also: flush, if, let

mellow

1. noun, slang A state of calm enjoyment. I went to chill by the lake, but the yacht rock coming from the boat kind of harshed on my nature mellow.
2. adjective, slang Intoxicated by drugs or alcohol. I didn't have a good time at the party because everyone was mellow except me.

mellow out

1. To relax; to calm down. I don't think he has mellowed out yet—I can still hear him yelling.
2. To cause someone to relax; to calm someone down. In this usage, a noun or pronoun can be used between "mellow" and "out." If the baby's crying, try putting her in her swing—that usually mellows her out.
3. To make something less bold in appearance. In this usage, a noun or pronoun can be used between "mellow" and "out." My hair is too dark right now—I think I need some highlights to mellow it out.
See also: mellow, out

mellow yellow

1. slang A nickname for the psychedelic drug lysergic acid diethylamide (LSD). I had a real bad trip on mellow yellow last time—I'll never do drugs again.
2. slang Dried banana peel fibers for smoking. (Smoking them was thought to produce effects similar to LSD). At first, I thought my parents were telling me that they dropped acid back in the day when they mentioned mellow yellow, but now I know they were talking about some weird thing involving banana peels.
See also: mellow, yellow
Farlex Dictionary of Idioms.

mellow out

 
1. to become less angry. When you mellow out, maybe we can talk. Come on, man, stop yelling and mellow out!
2. to become generally more relaxed. Gary was nearly forty before he started to mellow out a little and take life less seriously. After his illness, he mellowed out and seemed more glad to be alive.
See also: mellow, out
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

mellow out

Become genial or pleasant, calm down, relax, as in The teacher mellowed out when they explained what had happened. This expression uses mellow in the sense of "ripening," with the connotation of softness and sweetness. [Slang; late 1900s]
See also: mellow, out
The American Heritage® Dictionary of Idioms by Christine Ammer.

mellow out

v. Slang
1. To make someone relax; cause someone to become more genial and pleasant: A nice cool drink would mellow me out right now. A nap might mellow out the kids.
2. To relax; become genial and pleasant: Hey, don't get so upset; just mellow out! We stayed at home and mellowed out all day.
3. To make something less intense or less striking: I added some white to the paint to mellow the color out a little bit. We added candles to mellow out the atmosphere.
See also: mellow, out
The American Heritage® Dictionary of Phrasal Verbs.

mellow

1. mod. relaxed; untroubled; laid back. She is the mellowest fox I know.
2. mod. slightly alcohol or drug intoxicated. I got mellow and stopped drinking right there.

mellow out

1. in. to calm down; to get less angry. When you mellow out, maybe we can talk.
2. in. to become generally more relaxed; to grow less contentious. After his illness, he mellowed out and seemed more glad to be alive.
See also: mellow, out
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • If it's yellow, let it mellow. (If it's brown, flush it down.)
  • Please Excuse My Dear Aunt Sally
  • flush away
  • Flushing
  • PEMDAS
  • all students take calculus
  • student
  • ROYGBIV
  • Battle Ends And Down Goes Charles' Father
  • Charles
References in periodicals archive
In addition to this, Mellow will provide oils and premium concentrates to Captor's retail outlets.
Equally, its pithy, citrus touches add freshness while the haggis gently mellows Ossian's hoppy finish.
After evaluating several vendors, Mellow Mushroom decided that the SecureConnect National Account Program, which offers franchisors a cost-effective, comprehensive solution, was the best choice.
Finally, spare a thought for the countless wild animals and birds that are out there in the thick of these nerve-shattering explosions that make up our season of mists and mellow fruitfulness.
Now he hopes Mellow Park, winner of last Saturday's Lancashire Oaks, can follow up at the Curragh.
Things were harder this time as Mellow Park pulled clear to take the Group Three contest by a length and a half from Lady's Secret.
And the result is a warm and mellow album, which is a worthy follow-up to his Mercury Prize-winning Hour of The Bewilderbeest.
MELLOW JAZZ can provide trainer Ed Dunlop with a rare success at an all-weather track in the Ladbroke All-Weather Trophy Handicap (Qualifier) at Lingfield tomorrow.
Although nitric oxide may make male mice mellow, it seems to act in the opposite manner in mother mice.
It is from this period that the phrase mellow pad is taken, shortened in The Paris Bit to Pad.
The blue colour of Mellow Gold Bubblegum ice cream is achieved through the use of Spirulina, a 100percent natural and highly nutritious blue-green micro water plant which is approved for use as a food colorant both in the US and Europe.
Crisp and aromatic, it is rather like a mellow sauvignon blanc but supercharged with terrific tropical fruit undercurrents.
"My wife and kids are the most important thing for me and they do mellow me out even when I play football with them in the garden.
"I am much more mellow," said Clarke as he prepared to meet up with fellow Irishman Paul McGinley, Swedes Henrik Stenson and Robert Karlsson and England's Lee Westwood.
Cleage's wonderfully mellow voice is filled with her cultural and regional resonance and is, not surprisingly, perfectly suited to her words.