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*