Reckon mine's longer ...
Back in the dim and distant days when there were no chatrooms, and messenger was something you called a young lad from the post office, the only way to "chat" was via message boards. I'm into classical music, and joined such a "board" on the Excite website.
Everyone was very nice and friendly, but a touch "staid" - a little bit prudish, so I thought I'd shake them up a bit. I registered as a second user called "SingingStud", who sang bass in a choir, and who used to like talking about shagging a few sopranos after a good concert, and other sexual exploits. Everyone hated him! How dare he disturb everyone's cosy little chat room like with talk like that ! I got flamed numerous times, and he was simply and curtly referred to as "Stud".
Gradually, though (since he clearly knew his stuff regarding music), people started to warm to him (and I did mellow him slightly). Over time, he began to be referred to as "Studs", then "Studsy", and one day - "Sudsy". That one stuck, for some reason, and I've used it ever since.
Anyone else got a longer (and more interesting!) story?
Sudsy