We use it to say that we will eat something exotic and delicious that, of course, does not exist.
It is a very popular salmantinism that means "anything", referring to a homemade food or stew undetermined or identified.
My mother always said when you asked her that she should eat she always answered: Canguingos guisaos a la Jota
canguingo:e a colloquial or folk expression that applies to anything, to encourage the occasion.