special sauce
Noun
Meaning
A basic ingredient in McDonald's Big Mac hamburgers, a sort of Thousand Island dressing (now called Big Mac sauce by the company).
(figuratively) Synonym of secret sauce.
Burger sauce.
Source: en.wiktionary.orgNoun
A basic ingredient in McDonald's Big Mac hamburgers, a sort of Thousand Island dressing (now called Big Mac sauce by the company).
(figuratively) Synonym of secret sauce.
Burger sauce.
Source: en.wiktionary.org