ditchwater

noun

1. (uncountable, usually)The stagnant water that collects in a ditch.

   “The company, therefore, took their places, and addressed themselves to the serious business of the feast, but were soon disturbed by the hypochondriac, who thrust back his chair, complaining that a dish of stewed toads and vipers was set before him, and that there was green ditchwater in his cup of wine.”