if it's yellow let it mellow

phrase

In order to save water, do not flush the toilet every time you urinate.

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Meanings

phrase
  1. In order to save water, do not flush the toilet every time you urinate.

    It's a tad gross that I haven't been able to flush, but if it's yellow, let it mellow ... and run like hell-o.

    2011, Kirsty McKay, Undead, →ISBN
    2 more examples

    He went on to explain: I'm not gonna waste like a gallon and a half of water that we're stealing from the Colorado River just cuz I took a pee, you know like, 'if it's yellow let it mellow,' you know, don't flush it.

    2013, Laura Portwood-Stacer, Lifestyle Politics and Radical Activism, →ISBN, page 29

    Explanation: No! I did not have to follow the, “if it's yellow, let it mellow” rule—in fact, if I did follow that rule I would probably still be single.

    2016, Bo Bennett, Logically Fallacious, →ISBN

Origin

A short version of "if it's yellow let it mellow, if it's brown flush it down".

Full word history & related roots →
Cite this entry
APA

if it's yellow let it mellow. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/if%20it's%20yellow%20let%20it%20mellow

MLA

“if it's yellow let it mellow.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/if%20it's%20yellow%20let%20it%20mellow. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “if it's yellow let it mellow,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/if%20it's%20yellow%20let%20it%20mellow.

Source: if it's yellow let it mellow on Wiktionary, CC BY-SA 4.0.