the.com/mayonnaise

means A thick, creamy sauce made by whisking oil into egg yolks and an acid (lemon juice or vinegar) until they emulsify into something smoother than either ingredient alone.

from Genuinely disputed. The most popular story credits the French, naming it after Mahón, the port city on Minorca, supposedly commemorated by the Duc de Richelieu's chef after a French victory there in 1756 — 'mahonnaise' softening into 'mayonnaise.' Other theories point to 'moyeu,' an old French word for egg yolk, or to 'manier' (to handle/stir). No version is fully confirmed; the Mahón tale is the one that stuck because it's the one with a story attached.