Definition & Meaning of "pooner"in English

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

Pooner is a slang term that appeared in late 20th-century English within some queer and trans subcultures to describe a trans man who does not pass as male, often implying a stereotypically "clocky" or visibly trans appearance. The origin likely comes from informal naming patterns in subcultural slang, though the exact etymology is unclear. Historically, it has been derogatory, used to mock, belittle, or police trans men's gender presentation. Today, it remains offensive and is generally avoided outside discussions of vintage or subcultural slang.