A slight shake of the head, meaning you screwed up so bad, that the other side can only shake their head. Or, other side is fed up with your shit.
Example 1:
Bob: DUDE! I ate a porcupine -- when it was still ALIVE!
Freddy: *Shake of the head*
Example 2:
Bob: Dude, I climbed Mt. Everest, pulled of my helmet, para-glided down, and landed on my head! And the only evidence I have is this small scratch on my elbow!
Freddy: *Shake of the head*
A phrase which has never actually been spoken aloud. Instead, it is found exclusively in letters to the editor and on message-boards. Must be spoken with a grumpy old white man accent.
Legalize marijuana? You need to give your head a shake, boy. And get off my lawn.
"Shakes Head" is a word commonly used by teenagers that they utter to their parents who conduct themselves in a manner that is somewhat embarrasing to the teenanger. This occurs when someone brings a friend home and the father or mother say, act or make a motion that will embarasss their teenaged son or daughter. Immediately the teenager places the palm on their hand onto their forehead at the same time shaking their head and say the words "Shakes Head", immediately after the act or gesture of embarassment is displayed.
Dad quit shitting yourself in front of my friends"...."Shakes Head