A friend who cheers for any team that is currently playing against yours.
Also, a friend who always cheers against your team because his/her team gives them nothing to cheer for.
The Vancouver Canucks just beat Chicago and are onto round 2 to face Nashville. James is going to be pretty upset, I wonder if he'll be Pulling a Mark Smith and cheer for the Predators now?
The principal was overstepping his authority and pulling a Mark Emmert when he cancelled the Homecoming Parade for four years, just because the boys' cross country team dressed up as seamen (semen, get it, haha).