Definition & Meaning of "ass pirate"in English

What is the origin of the term "ass pirate" and how is it used?

Ass pirate is a slang term that appeared in mid–20th-century English to describe a man who engages in anal sex, particularly one who actively pursues it. The term combines "ass," referring to the anus, with "pirate," suggesting someone who seeks, raids, or plunders, so it literally frames the person as actively going after anal sex. Historically, it was derogatory and vulgar, used to mock or insult men for their sexual behavior. Today it remains informal, crude, and offensive, typically limited to sexualized, joking, or aggressive contexts rather than polite conversation.