A degenerate, someone who fucks you behind your back
sometime associated with heavy drug users
A Two faced bitch
Sometimes skumbags have scars from slash marks on their faces

The two states of being are as a human being, or a hungry ghost. Semi-regularly you need to ask yourself which you are. Sometimes it is human. Others, alas, it is hungry ghost.

The hungry ghost seeks validity outside of themselves. Someone pining for an indifferent ex is a hungry ghost. Someone who arrives alone at 6:30 on Saturday night to a pub is probably a hungry ghost. Obsessive checking of mobile phones, chat sites or networks are clear signs that one is a hungry ghost.

The best thing to do is just stay home and ride it out. Read a book. Find some good clean fun.

One who does the dirty shit that needs to get done when one else will.

a person who is a gang member and thinks they are better than everyone else

although they are dumb and don't get no more besides going to jail
they tend to hate on people and talk things behind their back to make themselves feel good.