Definition & Meaning of "rectal ranger"in English

What is the origin of the term "rectal ranger" and how is it used?

Rectal ranger is a slang term that appeared in mid-20th-century English to mock a man for engaging in anal sex. The term combines "rectal," referring to the anus, with "ranger," implying someone who roams or actively participates, creating a humorous or derisive image. Historically, it was derogatory and mocking, used to shame or belittle men for their sexual behavior. Today it remains informal, crude, and offensive, generally limited to joking, sexualized, or aggressive contexts rather than polite or neutral conversation.