When you and a partner of the female persuasion are engaging
in sweet passionate butt sex and you let your man juice go in her ass. To your shock and horror when you pull out, a horrible mixture of jizz and shit leaks out of her ass. This mixture closely resembles coffee and cream, thus you have "coffee cream butt cheeks".
That girl had a horrible case of coffee cream butt cheeks after I blasted a mean one in her cinnamon ring. I promptly threw up all over her, then doused my dick in Lysol.