it's my old highschool nickname. My JV baseball coach fumbled my name (Bruce) and recovered by saying "Bruiser." It was an ironic name because I might look like a big brute, but I'm a pretty nice guy, and I can't play Baseball a lick ;-) the 80 is my birth year, because Bruiser's a pretty common avatar name.
More interestingly, my online name I tend to use is Noble_Paladin. I picked that up from good ole' Diablo. "Well met, Noble Paladin" I've yet to log in anywhere that this name wasn't taken :-D