JFKhead 

When your hair is so disheveled it looks like you were shot in the back of the head by Lee Harvey Oswald. Usually accompanied by massive amounts of dandruff.

For fuck sake, did you see Steve's JFKhead? He's a really dirty bitch that does not shower.

JFKhead by El_bronco February 22, 2014

JFKHeadChunk 

Someone that is a silly troll

Or
Someone that is so much of a coward, that they have to make up a fake disgusting screen name to post smack talk.

He was so much of a coward, he had to make a JFKHeadChunk to talk smack on yellowbullet.com

JFKHeadChunk by Satan of Yellow Bullet March 17, 2013