A derogatory nickname for a member of the United States Coast Guard (in contrast with the US Navy). Primarily heard in US. My uncle, a former Navy SEAL, never hesitates to mock me for enlisting as a puddle pirate, instead of joining a "real" branch of the military. We tease them for being nothing more than puddle pirates, but the Coast Guard plays a pivotal role in keeping our country and its people safe.
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