Colonial Marines has a variety of slang used. This is an uncompleted compilation of slang that can be found used on the server.
- Bird = Dropship Rasputin
- BO = Bridge Officer
- Borg = Cyborg
- CL = Corporate Liasion
- CO = Commanding Officer/Commander
- CQC = Close Quarters Combat
- FF = Friendly Fire
- FOB = Forward Operating Base
- Frag = Fragmentation grenade
- IC = In character
- LoF = Lane of Fire
- LoS = Lane of Sight
- LZ = Landing zone
- Medevac/Medivac = Medical Evacuation, usually by droppod or shuttle
- MP = Military Police
- MT = Maintenance Technician
- OB = Orbital Beacon or the Orbital Beacon strike itself
- OOC = Out of character
- Phoron = Plasma
- Polyacid = Polytrinic Acid
- RDS = Red Dot Sight
- RO = Requisitions Officer
- SL = Squad Leader
- SM = Supermatter Engine
- SSD = Space Sleep Disorder, an in game way of describing disconnected or ghosted players
- Tricord = Tricordrazine
- XO/ExO = Executive Officer
- WY = Weyland-Yutani