sauce

sauce /ˈsɑːs/ noun
plural sauces
sauce
/ˈsɑːs/
noun
plural sauces
Britannica Dictionary definition of SAUCE
1 
: a thick liquid that is eaten with or on food to add flavor to it
[count]
[noncount]
— see also soy sauce, tartar sauce, white sauce
2 
[count] : a thick liquid or jelly made from cooked fruit — see also applesauce
3 
[singular] chiefly British, informal + old-fashioned : rude or impolite language or actions
4 
the sauce US slang : alcoholic drinks : liquor

what's sauce for the goose is sauce for the gander

— see 1goose