help?

i just got introduced into lolnexus and its overall pretty cool (for people who don't know what lolnexus is, its a website that lets you see the ranks and ratios of those in your games basically) and under my champion name there's a name like : Machoke, drazyfits and AoG Babytuxx etc... whats that? is it a nickname or something else it's just been bothering me