Pulling an Alec

The act of saying or promising you will do something and totally going against it no matter the circumstance, this could also mean somebody has done something stupid

Hey John said hed come to the party but he hasnt shown up AGAIN.
Friend: Is he really pulling an alec for the third time this week?

Pulled an Alec Baldwin

When you tell a girl you’re shooting blanks but get her pregnant anyway

Guy: Yeah, I just pulled an Alec Baldwin on this chick and now she’s pregnant.