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1.
stealing a friends girlfriend, or taking a girl away from a friend.
Dude are you seriously gonna try pulling a paco on him?
by pacodirtysouth July 14, 2010
 
2.
To promise something multiple times, and then A. Fulfill the promise VERY tardy (at least 2 weeks late) or B. Like a total scumbag, never fulfill the promise or C. Pretend there was no agreement in the first place.
Person A: So, do you think he will finish writing that text today like he promised?
Person B: Nah man. He's pulling a PACO. Not gonna happen.
by MetalGuardVixen March 01, 2013