AFAIK it means to do better than someone.... but you didn't, and you lost.
If I know you're coming, pre-aim, pre-fire, get 6 hits on you with an SMG, and you drop me in 3 shots because on your screen I just sat there like I was brain dead and never shot once, tell me how that's my fault. It unfortunately happens all too often in this game regardless of your connection.
"Persistence until excellence." http://www.youtube.com/user/supercoolisaac