Noob: Stop killing me it's unfair.
Noobslayer: I AM TEH NOOBSLAYER
They usually have a short temper too, acting aggressively and bossy with the community, tending to isolate themselves.
Noob Slayers like to aggro in groups, to lower their chances of defeat. In games like Lineage 2, Noob Slayers tend to "raid" areas like starting towns and areas where low level players tend to level up.
These players are attracted by pros, trying desperately to be friends with them. Obviously they fail in doing that, and that's the moment in which they act like total noobs by spamming and insulting other pple.