Top Definition
When a man thrusts his penis between a woman's large, soft butt-cheeks, eventually ejaculating on he back. Similar to titty-fucking, but with the butt-cheeks. No penetration, just a jack off with the cheeks.
I got up behind her and totally pillow topped that bitch. I was pillow topping her again and again, then blew my wad right up her back.
by jediracer July 06, 2010

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