A pumpfaker is a person who states intentions to do something, and never follows through. A person who is notorious for making plans, but never following through.
A person who consistently Curves people.
Guy 1: Tamiasaid she was gonna come over, and never texted me back.
Guy 2: Yeah, she's a pumpfaker man, don't take anything she says to heart
When your fucking a bitch in the ass by a window with the lights off then tell her you'll be right back then your friend comes in and finshes the job while you wave at her through the window (she has no idea the friend is fucking her while you wave).
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.