look up any word, like swag:
 
1.
To say you are going to do something and then back out at the last minute. To flake out.
I can't believe you piked out again last night. You are such a piker.
by Smoove B March 24, 2005
 
2.
to yell, freak out (usually at someone else), giving shit to someone
don't pike out on me, just cause you fucked up!
by bmoc November 05, 2003