ˈdisfəˌmizəm noun
( -s )
Etymology: dys- + -phemism (as in euphemism )
: substitution of a disagreeable, offensive, or disparaging word or expression for an agreeable or inoffensive one (as of axle grease for butter, old man for father, or heap for car ) ; also : a word or expression so substituted — contrasted with euphemism