The act of standing on your head while doing anal whip-its, eventually giving you flatulent reverberating sounds out of your ass called the "The Wah-Wahs" like you get in your head from doing whip-its.
She did a flip-it(z)on me until I turned blue in the face. I will never do that again. And, I'm not sure, but I think she got a lot of enjoyment of squirting me in the ass with white cream for a change. Flip-Itz