back stabbing Hussain
Someone that you have grown to be really close friends with, but then they go and go behind your back and betray you when you are not looking. Normally they look really ugly, are hustlers and for some bizzare reason, they all seem to be called "Mehmet".
Look, there's the back stabbing Hussain that asked a colleague to wear his blazer inside-out so that he could come from behind and screw him over..