When a girl sends you a dick pic even tho she does not have a dick and you have to wonder if shes sending you another guys dick pic to assert dominance, or if its a warning. Paulina in the Celtic culture refers to a headstrong and dominant woman, so when a woman sends a dick pic in response to yours, she is channeling her inner Celtic.
Guy A: "Damn, this girl just sent me back a dick pic!"
Guy B: "What a dick pic paulina!"