Taking on the appearance of a Rastafari in an attempt to be unique. Usually it involves the wearing of the dreadlocked hair style. However, in the effort to look different , by sporting dreadlocks, the person has joined the masses, rather than seperated themselves from the masses.
Also, one who wants to appear as a follower of the Rastafarian religion, which involves using marijuana, as a sacrament; but they don't actually smoke marijuana.
I'm not sure who made that last tackle...I couldn't read the player's name on the back of his jersey. The NFL is full of all of these McRastas.