Malapropism
Pronunciation : Mal"a*prop*ism
Part of Speech : n.
Etymology : [From Mrs. Malaprop, a character in Sheridan's drama, " The Rivals," who makes amusing blunders in her use of words. See Malapropos.]
Definition : Defn: A grotesque misuse of a word; a word so used.
Source : Webster's Unabridged Dictionary, 1913