# yellow grease

idiom

Source: https://englishreference.com/idiom/yellow-grease
Updated: 2026-08-10

## Meaning

Used vegetable oil purposed for use as biodiesel.

## Examples

- The factory collects yellow grease to make fuel.
- Many restaurants now sell their used yellow grease to companies that produce sustainable biodiesel.
- By refining yellow grease into a viable energy source, the facility significantly reduces waste while providing a cleaner alternative to traditional petroleum products.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.