A debaucherous act; a sexual act that is considered inappropriate.
Mischievous behaviour, dishonest or shady activity.
Amorous behaviour, smooching, making out, necking, sexual intercourse or other sexual activity, especially if illicit.
Behavior that is considered to be unacceptable.
To mismanage.
To behave inappropriately, to misbehave.
To act improperly.