Definition & Meaning of "meat flap"in English

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

"Meat flap" is a crude slang term for the labia of the vulva that emerged in late 20th- or early 21st-century English, mainly in informal, sexual, or shock-humor contexts. The term uses "meat" to refer to flesh and "flap" to describe the shape and movement of the labia, creating a blunt, visual metaphor. It is used in sexual, joking, or derogatory speech, often to mock, objectify, or provoke. The term is highly vulgar, sexual, and never neutral, and it is inappropriate in polite or formal settings.