The use of tattoos as an indicator of douchebaggery in men. Those with tattoos containing any color other than black have a high probability of being a douche. Those with tattoos containing only black ink are included in the douche category if any of those tattoos are in the form of an armband. Tattooless individuals are in the safe category unless those individuals can also be identified as metrosexual, which then puts them at extremely high risk for committing douchebaggery.
"Molly, you’d better steer clear of that guy. His lame ass sports logo tattoos and tribal armband put him on the high risk list as defined by the Tattoo Theory of Douchebaggery, and just make him look like a tool."