1. The portmanteau couple name for the James McAvoy and Michael Fassbender RPS pairing.
2. Fandom involving the two actors James McAvoy and Michael Fassbender.
3. A good example of bromance that has spread like a wildfire after the newest X-Men-movie "X-Men First Class" where the two actors played Professor X(McAvoy) and Magneto(Fassbender) together.
4. Also claimed to be a lifestyle cultivated by fangirls of the McBender Bromance.
TumblrFangirl 2: Keep calm and ship FassAvoy/McBender!<3