The Collaborative International Dictionary of English v.0.48:
Unmannerly \Un*man"ner*ly\, a. Not mannerly; ill-bred; rude. -- adv. Uncivilly; rudely. -- Un*man"ner*li*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
unmannerly adj 1: socially incorrect in behavior; "resentment flared at such an unmannered intrusion" [syn: ill-mannered, bad- mannered, rude, unmannered, unmannerly]