The Collaborative International Dictionary of English v.0.48:
Spurner \Spurn"er\ (-[~e]r), n. One who spurns. [1913 Webster]WordNet (r) 3.0 (2006):
spurner n 1: a person who rejects (someone or something) with contempt; "she was known as a spurner of all suitors"; "he was no spurner of rules"