Basically when a person does a handstand and then proceeds to do a shit everywhere so it covers part of their body. This occasionally pops up in grot mags but is quite rare. If one finds some then it is their job to show all there mates as soon as possible. Warning, dont show ur parents, this has been known to lead to some strange looks and even worse ideas, u dont want ur parents doing the brown acrobat in the next room do u?
Bob: Wow, did u see that porn last night dude,
Andy: Yeh dude that chick pulled off a brown acrobat, twas a great wank to start off the new year
Bob: Yeh it really was