Definition & Meaning of "gaper"in English

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

"gaper" is a vulgar slang term that likely arose in late 20th–21st century English, using the verb "to gape," meaning to open widely, to create a graphic and crude metaphor for a visibly stretched or open anus. The term is primarily used in informal, pornographic, or hostile contexts to shock, mock, or insult someone sexually. It is highly derogatory, explicit, and offensive, and it is never neutral.