The Collaborative International Dictionary of English v.0.48:
Misbehavior \Mis`be*hav"ior\, n. Improper, rude, or uncivil behavior; ill conduct. --Addison. [1913 Webster]WordNet (r) 3.0 (2006):
misbehavior n 1: improper or wicked or immoral behavior [syn: misbehavior, misbehaviour, misdeed]