Definitions

1. noun

A person who disguises themselves, especially to play a trick or a prank, or to engage in mischief.

“The group of friends turned out to be guisers, playing a prank on the unsuspecting homeowner.”

2. verb

To disguise oneself, especially to play a trick or a prank, or to engage in mischief.

“The kids decided to guise up as old men and go trick-or-treating.”