Glass Muffin
A "glass muffin" or also known as a "swan hole" is a contemporary but subtle meaning for a fragile female genitals. The male will try to inserts the penis into the female's glass muffin, but the vagina will just redden, bleed and shoot out stools.
Hal- Dude Jamie had a freking glass muffin when i was banging her.
Drew- Weak man.....
Drew- Weak man.....