I was given the nickname by my best friend's sister while I was in the 6th grade. The name stuck and people called me that through high school, and I even responded to it as my name. I decided to use it as a user name because it was witty and was very unique. In fact I have yet to see the word boogles used in any context except non-sensical sentences. So I think I made a good choice.
People remember it very well, and it spells itself.
So, I was over at my best friend's house. His name is Chris, and his sister's name is Holly. We were playing some computer game on his TI-99 where one is a knight. Being the young kids that we were, they both bugged me incessantly with this. After that it spread like wildfire, and like most childhood nicknames it was impossible to escape even if I wanted to.