theino,
I was registered at more or less 50 Chess sites in the Internet but I don't play there anymore. My name was still there on those chess sites. I only play chess now at
Chess.com, Chessmaniac and sometimes I come here at Lichess to play. One of our Chessmates calls me GMBD. From that time on, I like the meaning of GMBD that's why I always post it after my name on it.
The reason he calls me GMBD is that I love Ballroom Dancing so much more than playing chess games.
So, the meaning of GMBD is Grand Master in Ballroom Dancing.
Thank you for asking,
Ray
Ray Duque III (GMBD), USA