When a woman's labias hang out or pertrude out to resemble two pieces of foldedlunch meat. Some vaginas are this way naturally, though they tend to get that way from a lot of usage like with pornstars or a ho.
When you got a roast beefpuss and there’s mad meat.
Johnathan: “How was that piece of ass last night?”
Joey: “Bro there was so much meat, it be raining from the sky!”
Johnathan: “Damn! She got that meatpuss!”