the GNU version of the Collaborative International Dictionary of English
n. One who derides, or laughs at, another in contempt; a mocker; a scoffer.
The Century Dictionary and Cyclopedia
n. One who derides; a mocker; a scoffer.
Word Usage
"Though an inveterate derider of the American success myth, West is much less sanctimonious than the lefties and communists who badger him and whose utopian fantasies he resists."