Piece of Scumbag
An individual who does not quite possess the capabilities of a contemptible full blown scumbag and is therefore referred to as a Piece of Scumbag (POSB). It is often feared that POSB's will realise their full potential and evolve into their more powerful form.
*Playing COD*
Man that guy is a Piece of Scumbag!
Man that guy is a Piece of Scumbag!