Wish-wash

Between the result of the above, and the ordinary wish-wash served as coffee, the difference is too great to be expressed.

Source: wiktionary

The famous bohemian cafés, the Dôme, the Coupole and the Rotonde, still remained; the hooded iron stove still warmed the regulars settled beside the round tables from the wintry streets; the waiter, with the unvarying rudeness of Paris, served the "national coffee," that grayish-brown wish-wash which passed for coffee in Paris and which, like everything labeled "national," roused the suspicion that it wasn't what it was called but only resembled the real thing.

Source: wiktionary

They got 250 grams of bread and wish-wash for breakfast; in the evening, he who had worked got kasha, wish-wash, and bread.

Source: wiktionary

It consisted of bread and for the first course "the usual wish-wash” (balanda), “so-called soup in which several pieces of congealed cabbage floated.”

Source: wiktionary