To behave inappropriately, to misbehave.
To mismanage.
To act improperly.
Behavior that is considered to be unacceptable.
To deal with a situation incorrectly or ineffectively; to make a mistake in handling a situation.
To manipulate something roughly, causing physical damage.
Improper, wrong, or bad usage or treatment; abuse.
Rough manipulation which causes physical damage.
Ineffective or incorrect deal.