plural misbehaviors
Definition of misbehavior
1
: bad, improper, or rude behavior : ill conduct
scolded the children for their misbehavior
2
US military law
: any conduct by a member of the armed forces before or in the presence of the enemy that does not conform to military standards or practice for such a situation
… is charged with desertion and misbehavior before the enemy, the latter of which carries a maximum penalty of life in prison. — The Boston Herald
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Merriam-Webster unabridged
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Time Traveler for misbehavior
The first known use of misbehavior was in the 15th century
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