Leathernecks is a colloquial term that typically refers to members of the United States Marine Corps, specifically the infantry. However, there are several synonyms for this term that are equally descriptive and perhaps even more widely recognized. For example, "jarheads" is another nickname for marines that might be more familiar to those outside the military. Other potential synonyms include "devil dogs," "grunts," and "ground-pounders." Each of these terms carries a slightly different connotation, with "devil dogs" perhaps being the most aggressive and "ground-pounders" the most straightforward. Regardless of the term used, all are indicative of the elite fighting force that is the USMC.