That which is foul (in various senses); foulness. In later use usually with the, typically opposed to the fair (cf. fair, n.1 2a).

Chiefly in religious contexts. That which is morally corrupting, impure, or degrading; something vile, contemptible, or loathsome.

figurative. Anything vile or corrupt; †corrupt mass; ‘garbage’, ‘filth’.

concrete. Feculent matter; dregs, lees, dross, scum. Also (now chiefly) in stronger sense, filth. literal and figurative.

An unpleasant-tasting substance. Now rare.

colloquial. Unpleasant or unappetizing solid or liquid matter, esp. food, drink, or medicine.

(a) in allusion to the phr. to cry stinking fish at cry, v. 5b(b): something worthless or rotten; (b) Ghana (see quot. 1973).

A general term of disparagement for someone or something that is repugnant or odious, unpleasant, or dull; also, dirt, grime. Also attributive.