yellow grease

noun

Used vegetable oil purposed for use as biodiesel.

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Meanings

nounyellow grease (uncountable)
  1. idiomaticuncountableUsed vegetable oil purposed for use as biodiesel.

    Using waste oil can be much less problematic, but in the US, waste oil is sold by rendering companies as yellow grease, and to a certain extent yellow grease is a substitute for fresh oil.

    2008, Forest Gregg, Christopher Goodwin, SVO: powering your vehicle with straight vegetable oil, page 4
Cite this entry
APA

yellow grease. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/yellow%20grease

MLA

“yellow grease.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/yellow%20grease. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “yellow grease,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/yellow%20grease.

Source: yellow grease on Wiktionary, CC BY-SA 4.0.