The art of pretending to take a photo of your significant other in order to actually take a photo of somebody else that you are more interested in. This is most often done at the beach or a car show. Your significant other must be in on the act for it to be a full Dickerson.
Hey honey, can you help me get a Dickerson of the girl over there? I don't want her to think that I'm some sort of creep. The guys at the office are going to love it!