Horsie Sauce 

The leftover semen from the person before, that is still on the stretched out pussy lips Arby's Roast Beef of the slut you just banged.

I didn't notice she already had horsie sauce on her Arby's roast beef.

Horsie Sauce by Manthorn March 5, 2009

horse sauce 

a nickname for the drug ketamine, a horse or cat tranquilizer.

my buddy always acts so dumb when he does too much horse sauce

horse sauce by horsetranqguy August 24, 2019

Horse cheese soup sauce 

A popular type of sauce, typically used on cheese sandwiches in Wisconsin

We ran out of horse cheese soup sauce so I didn’t want to eat my sandwich

Horse cheese soup sauce by Matt sherl September 1, 2019