Mayhem is a criminal offense consisting of the intentional maiming of another person.

A state or situation of great confusion, disorder, trouble or destruction; chaos.

Infliction of violent injury on a person or thing.
The fighting dogs created mayhem in the flower beds.

(law) The maiming of a person by depriving him of the use of any of his limbs which are necessary for defense or protection.

(law) The crime of damaging things or harming people on purpose.
To disable someone, to mutilate or to cut off a person’s body part, so that he/she may not function properly. 

The act of removal of a body part that would handicap a person’s ability to defend himself in combat.

usual modern use of “mayhem” to mean “havoc and disorder”.

Later the meaning of the crime expanded to encompass any mutilation, disfigurement, or crippling act done using any instrument