We were playing a game called pickle at the park, years ago, and we rolled some socks up into a ball so that we could throw it back and forth. We didn't have a ball of any sort.

Part of the game is to taunt the other players, and I thought the sock-ball looked kinda like a lemon, the way that it was shaped. So when they would throw it towards my base, I would dodge it and say "thank you for the lemonnnnn!!!" in the most taunting voice I could.

And for some CRAZY reason every loved it. Then, years later, my best friend Ben made that his screen name on MSN and I was like "oh yeah hahahaha I remember that!" and then I started using it for screen names.