Exactly the same as the bassalisk from
Harry Potter, except that it is made up of Ass'. It is entirely more sneaky and cunnig than an actuall bassalisk and has
sexual relations with
dumbledore and Harry. Niether of which know about the others relationshio with the assalisk.
This can also be sed as a common phrase to describe someone as a cheater, or a devlishly sneaky and evil being.