What does Anus soda mean?

Anus soda meaning in Urban Dictionary

An Anus Soda is when you do a handstand and let some other person put a funnel to your rectum and pour in soda. After that, you sit, masterbate furiously, and just before have an orgasm, you open your rectum and let most of the soda drip down as you cum. After ward, somebody else will be eat everything up and/or lather it into their genitals and skin.