Basic Marine Terminology/Jargon

Clothing
Hat -- Cover
Shirt/Jacket -- Blouse
Pants -- Trousers
Underwear -- Skivvies
Civilian Clothing -- Civvies
Running Shoes -- Go-Fasters
Flashlight -- Moonbeam
Camouflage Uniform -- Cammies
Loose Thread -- Irish Pennants

Orders
Yes -- Yes sir/ma'am/rank
No -- No sir/ma'am/rank
I understand & will obey -- Aye (or aye, aye) sir/ma'am/rank
Cancel Previous Command (a) -- As You Were
Cancel Previous Command (b) -- Belay That/Last
Continue -- Carry on
Clear Area -- Clear the Deck
Cleaning Day -- Field Day
Get out of my way -- Gangway!
Tidy Up -- Police
Gossip - Scuttlebutt
Re-Enlist -- Re-Up
Go to Medbay -- Sick Call
Loiter -- Skylark
Straighten Up -- Square Away
Unorganized Close Order Drill -- Diddy Bop
Permission to Leave -- Dismissed
Permission to leave/break formation -- Fall Out

Structures/Places/Other
Floor -- Deck
Wall -- Bulkhead
Ceiling -- Overhead/Overhang
Front of Ship -- Bow
Rear of Ship -- Aft or Stern
Left -- Port
Right -- Starboard
Kitchen -- Galley
Command Post -- CP
Dining Room -- Mess/Chow Hall
Food -- Chow
Candy/Sweets -- Poggie Bait
Living Quarters -- Barracks/Squadbays
Hospital/Medical Center -- Sick Bay
Bed -- Rack
Flag -- Color
Flag aboard Ship -- Ensign
Drill Field -- Parade Deck/Grinder
Stairs -- Ladder
Door -- Hatch
Window -- Porthole
Corridor -- Passageway
Upstairs -- Topside
Downstairs -- Below Deck
Commanding Officer -- CO
Executive Officer -- XO
Staff Non-Commissioned Officer -- SNCO
Non-Commissioned Officer -- NCO
Nuclear, Biological, Chemical -- NBC
Senior Drill Instructor -- SDI
Drill Instructor -- DI
Forward Observer -- FO
Landing Zone -- LZ
Extraction Zone -- EZ
Rules of Engagement -- ROE
Observation Post -- OP
Listening Post -- LP
Non-Judicial Punishment -- NJP or Ninja Punch
Unauthorized Absence -- UA (not AWOL)
Military Occupational Specialty -- MOS
Job/Assignment -- Billet
Kilometer -- Klick
Minute -- Mike
Millimeter -- Mike-Mike
On the Move or On Mission -- Oscar Mike (only used when mounted ie. in vehicles)
Forward Operating Base -- FOB