Oreo cum is the combined cumshots on the cookie that guys use when they're playing the masturbation game, Cum-on-a-Cookie, which the last guy to cum has to eat.
When you are fucking a bitch wearing a powdered wig ( the kind of wig George washington and the quaker oatmeal guy wore) and right before you blow your load, slap a handfull of oats on her belly and pull out and shoot all over the oats, then you give the bitch a spoon and make her eat it off of her stomach.
Man sarah is on a Quaker cum meal diet, she ate it for breakfast, lunch and she told me she wanted some for dinner too!!
W: we should use a condom.
M: no, we don't have to until the end.
W: doesn't pre-cum have sperm?
M: no it's some juice that makes your dick pipe smooth.
W: bye.