Welcome to MPGH
To "flame" somebody, basically means to curse or use foul language directed at somebody else. (ex. "F you!", "You're a little B with an itch!", racism, sexism, etc.)
It is against the rules, which I suggest you read.
A user title, is the little part of a user's profile right above their avatar. It can be changed to text (custom colored) after reaching 500 posts, or a small graphical image (jpg, gif) after reaching 1337 posts. There are however, rules and limitations to this process to know. To make a change to your user title (or even your username), you must request it in the Staff Requests section. For now you are not able to change/request anything. It is also possible to Donate to MPGH, as I have (visible from my name color and tag), and then change your usertitle or username regardless of post count.
I would suggest reading this: http://www.mpgh.net/forum/118-staff-...l-ignored.html
This really all matters if you're active around the forum and end up using this site frequently. Lots of people make accounts post once or a couple of times, and then just die, so yes, you are a noob.