A sex move, similar to a spit roast. In a threesome involving two
men and one woman (or three
men, I don't judge), one man fucks the woman doggystyle while she gives the other man a blowjob. Upon nutting, the man behind her cums in the vagina (fluffing her up), while the other man nuts on her face.
The name comes from the delicious sandwich made with peanut
butter and Marshmallow cream.