A phrase designed to dismiss what someone has said in a manner both abject and sardonic. Its precise meaning is somewhere in between "Sorry for partying" and "Cool story, bro".
An interjectory outburst created by C*****n H**d which can be used for near any occasion in which one shows agreement with what's going on. Usually said in less than half a second, in a quick outburst, with more emphasis and tone of agreement being put on the "o", and during a period of short pause in the main speaker's conversation.
"It's amazing how you think the world is square. I can show you scientific proof that shows otherwise. If i pulled up the recent geography of the world i promise you your outlook would change quickly. The world is round not square."
When you point out something to make someone else look quickly, but what you said was there really isn't. It is only a broken neck if the person turns their head to look at it. If you did break their neck, then you place your hand on the back of their neck and "run it". If you really look, but said you didn't and don't accept the fact that you got your neck broken, this is called being a Cowan or Matt Cowan.
James: Oh my god, Stru, look! It's snowing outside.
Stru: *quickly looks but it is actually a bright sunny day*
James: Broke ya neck! *runs Stru's neck*
Stru: ...Fuck!
or
Cacioppo: Yo Cow! Is that Mark over at the basketball court?
Cowan: *looks towards the court and nobody is there*
Cacioppo: Damn! Broke ya neck!
Cowan: What the fuck are you talking about I didn't look at all!
Cacioppo: Ay..don't be a Cowan.