master-at-arms

noun masters-at-arms

1. Navy, UK A warrant officer or chief petty officer responsible for discipline aboard a naval ship. Episode 12, The Cyclops Then he was telling us the master at arms comes along with a long cane and he draws out and he flogs the bloody backside off of the poor lad till he yells meila murder.
2. UK A commissioned officer responsible for overseeing all fitness training in subordinate units.
3. Navy, US A petty officer responsible for law enforcement, antiterrorism, force protection, and expeditionary warfare.
4. An officer in a fraternal or similar organization charged with maintaining order.