The word "mook" typically refers to a foolish or incompetent person. It is often used to describe someone who is dull-witted or lacks intelligence. Full definition
The campaign mode is mission - based, and in each mission you have to win over a large battlefield by taking over keeps and outposts, slaughtering thousands of mooks in the process. (impulsegamer.com)
The other mooks — Jesse Plemons as Kevin Weeks, W. Earl Brown as hitman John Martorano, Bill Camp as doomed World Jai Alai president John Callahan — are sketched with street - level realism rather than mob - movie bravado. (bostonglobe.com)
Majora's Mask lets you literally just hoist it straight off the raft with Magnesis, all while the gormless mook does sod all to stop you. (gamingreinvented.com)