I've been playing since the end of November, and I see a lot of these terms being thrown around but I'm not sure what they mean.

Elo/ Top Fragging/ Bottom Fragging/ Gridshot/ Auto Locking -- I had someone get pretty upset with me for picking Killjoy as quickly as I did. I usually try and get her fast since she's the one I'm most useful with, but I've never been called out on it before. Is it bad to pick an agent fast?/ DC/ DM/ Dodging

Sorry if this isn't formatted right. I'm on mobile. Thanks

Edited for clarity