What does ass handstand mean?

ass handstand meaning in Urban Dictionary

Before doing the handstand, pull-down your jeans just underneath the ass cheeks while wanting to conceal the activity together with your top. After that stand in front of a crowd, or a "target" and obtain in a handstand with your butt dealing with them, causing your top to fall and expose your butt. Bonus points when you can pull off and keep the goat during.