Mook adj, pronounced Mu-ook, used to describe a person, thing, animal or anything else you want. Used to abuse said 'thing'. Also used as a nickname; when used in this manner Mook is brilliant, the best, king 'mook', all around top liney.
Jockey:- "What's a Mook?"
Mooky:- "You're a fucking Mook!!!"
Jockey:- "No, come on what's a Mook?"
Mooky:- "You're a fucking Mook!!!"
Jockey:- "That's not very nice!"
Mooky:- "Fuck off you fucking Mook!!!"
In a roleplaying community, someone who metagames or goes against traditional roleplaying rules. Also could be a powergamer who works harder than actually necessary to be the best.
That guy just came up to me and knew my whole life story. What a mook.
That guy has been mining that mountain for seven days straight just so he has the materials for one day when someone is able to make him what he wants. What a mook.