There is no realy meaning to this word. It is used as a replacement for such words like: dead, screwed, messed up, done. It can also replace phrases such as: he is in for it, she is way over her head, or he is sooo done.
This word can be used in many ways, and is very versitile.
There is no true origine of this word, except that it cam from somewhere is St. Louis Missouri
"AHH man, Jordan is sooo ChUnK'd"
Person 1,"Dude, did you hear what Joel did yesterday?
Person 2,"Yeah dude he's ChUnK'd!"
Man 1, "Dude are you really going to fight George? He so ripped. Man you are ChUnK'd!"