Could you please elaborate on the phrase "What do Marines call Camo?" in the context of your question? Are you referring to the military term for camouflage or is there a specific term used by Marines that you're inquiring about? If the former, camouflage is typically referred to as "camo" in military parlance, but I'm not aware of a specific term used exclusively by Marines for this purpose. If the latter, could you provide more context or clarify your question so I can give you an accurate answer?