adv. unfairly. v. 1 make or become foul. 2 (of an animal) foul with excrement. 3 Sport commit a foul against (a player). 4 (often foll. by up) a (cause to) become entangled or blocked. b bungle. 5 collide with. ,7 foully adu. foulness n. [Old English] foulmouthed adj. using obscene or offensive language.
