Having a poo in a public place (toilets do not count) and not
getting caught, Examples include on a bus, in the cinema or from a tree.
The term is coined from
the dirty bottomed walking motion the poo'er gets from not wiping and quickly fleeing
the scene.
Examples have been caught on cctv famously a child in walmart and a woman in a shopping centre, both can be found on many media streaming sites.