muss
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Musses; MUSS; MUSS (disambiguation); Muss (disambiguation)
An intimidating person, a bully. Someone with a susceptibility to violence who will often become enraged with little or no provocation. Generally a muss will have a reputation for being one, so the label is earned by reputation rather than self-proclamation.
Musses rarely, if ever, take on someone bigger, stronger, or better trained.
2. Of, or pertaining to the physical, emotional and psychological characteristics of Jake from the New Zealand Maori movie, Once Were Warriors.
Did you see how Chris beat that guy within an inch of his life because he asked him for a cigarette? He's a real muss.