'Lugubrious' means 'looking or sounding sad and dismal'.  While still somewhat fitting, I chose it originally because I thought it meant 'slow'; it was my online name for my Wii U account, and the first online game I played was Sonic Racing, so I figured it would be pretty funny for someone named 'slow' to beat loads of people at racing.  I got that word from Disney's Hercules, at the point where one of Hade's minions refers to him as 'your Lugubriousness'.  I guess I just thought that it meant slow because of how the word sounded itself.