irrational exuberance

(from Investopedia.com:) An infamous phrase uttered by Alan Greenspan in 1996 to describe the overvalued market at the time.

Really, it means you're way too happy about something.

ME: Holy crap, did you see that?!
DUDE: Man, you got a problem with irrational exuberance. STFU.
ME: THAT KICKED ASS!
DUDE: Seriously, STFU!

by pinano July 14, 2004