Deviant behaviour or thinking is different from what people normally consider to be acceptable.
例句
...the social reactions to deviant and criminal behaviour...社会对偏常及犯罪行为的反应Of course, not all alcoholics and drug abusers produce deviant offspring.当然，并不是所有的酗酒者和吸毒者都会生育出不正常的后代。
N-COUNT
偏常者;反常者;离经叛道者
A deviant is someone whose behaviour or beliefs are different from what people normally consider to be acceptable.