liquid gold

liquid gold (countable and uncountable, plural liquid golds)

1. (literally) A kind of liquid preparation used to decorate ceramic ware with gold or gold colour.
2. (figuratively) Any liquid that is considered highly valuable, such as crude oil or breast milk:
   1. Sandalwood oil
   2. Crude oil.
   3. Water.
   4. Colostrum.
3. (figuratively) Any liquid that is yellow in color, such as beer, olive oil or a liquid cheese.
   • 2021 December 28, Kristen Hong, Fridge Love: Organizing Your Refrigerator for a Healthier, Happier Life--With 100 Recipes, Mariner Books, →ISBN, page 188:

     NACHO CHEESE SAUCE This is my liquid gold! I can't tell you how many bowls of steamed broccoli, sautéed spinach, bean pastas, and baked potatoes I've enjoyed topped with this sauce. This creamy, velvety, savory cheese sauce is […]

   1. Beer.
   2. (euphemistic) Urine. (Can we add an example for this sense?)
   3. (slang) Amyl nitrite.

• Eric Partridge (2005) “liquid gold”, in Tom Dalzell and Terry Victor, editors, The New Partridge Dictionary of Slang and Unconventional English, volumes 2 (J–Z), London, New York, N.Y.: Routledge, →ISBN, page 1215.