Definition
A U.S. Marine with an Infantry military occupational specialty (typically 0311), meaning they're trained for combat operations in the field. It's a badge of honor among Marines, distinguishing the boots-on-the-ground combat troops from support personnel.
Example Usage
That Marine isn't just a desk jockey—he's a Mud Marine with years of infantry experience.
Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=Mud%20Marine&defid=9962411)
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See “Mud Marine” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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