verb (used without object) 1.to
behave badly or improperly:
The children misbehaved during our visit.
verb (used with object) 2.to conduct (oneself) without regard for good manners or accepted moral standards: Several of the guests misbehaved themselves.
Origin: 1425–75; late Middle English; see
mis-1,
behave Related forms mis·be·hav·er, noun