A woman uses the toilet to make a number two and doesn't wipe well. Following this she commands you to perform analingus on her. If you adequately tongue her rear entry she allows you to masturbate in the corner of the bathroom while she ridicules the size of your penis.
So named because; like a warm Pepsi nobody really wants one, but if it all that is being offered you will probably take it.
I couldn't even get a hand job from that girl last night, all she was serving up was a warm Pepsi.