What is the meaning of Catchweight?

Without any weight restrictions; without being handicapped.

Without any weight restrictions; having no handicap.

Having no standard weight, but rather having weight determined when packaged for sale or shipping.

A weight category other than the standard weight categories: either an agreed-upon weight range or an agreement to allow any weight.

The weight of an item that is not set to a standard, but which varies around an approximate value.

The weight of all the fish caught.

Source: wiktionary.org