A combination of the terms "dirtbag" and "douchebag". used as a codeword by women to describe men who are scummy and have surpassed the levels of jerk and asshole.
That guy is such a total dirche I can't believe he would sleep around with all those girls when he has a girlfriend.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.