Ion mallet
An ion mallet was a piece of equipment used in the game Parrises squares. It might also be called a Parrises mallet, or simply a mallet.

In 2373, The Doctor's holographic daughter, Belle, could not find her ion mallet to play a game of Parrises squares. He suggested that if she put it in her closet  when she was finished, she'd know where it was. ()

According to Harry Kim, being hit by Nausicaan heavyweight with a mean right hook was not nearly as bad as taking a Parrises mallet to the ribs. ()

Recreation
Sporting equipment