filthy

Universal Words adjective, adverb adjective (filthier, filthiest) 1 very dirty and unpleasant: filthy rags / streets * It's filthy in here! 2 very rude and offensive and usually connected with sex: filthy language / words * He's got a filthy mind (= is always thinking about sex). 3 (informal) showing anger: He was in a filthy mood. * She has a filthy temper. * Ann gave him a filthy look. 4 (BrE, informal) (of the weather) cold and wet: Isn't it a filthy day? filthily adverb filthiness noun [U] adverb (informal) 1 ~ dirty extremely dirty 2 ~ rich so rich that you think the person is too rich and you find it offensive