"Jew Sauce" is usually used in conjunction with a situation or a thing. Something that is covered in "Jew Sauce" is usually extremely Jewish. It can also be used as a substitute for "awesome" things. This phrase also associates itself with Jew Cream, helping to exclaim excitement over getting a bangin' bag, picking up a bangin' girl, or a bangin' job.
"Oh my god, this homework is smothered in Jew sauce"
"This bitch was smothered in Jew sauce"
"That synagogue is full of Jew sauce"