Becoming infuriated on the internet over a video game, such as CS or Gunbound, in which the "e-rager" spams insults and flames towards a certain person or party in a repeated manner. Insults are usually followed by "gg" or "e-rage".
Random guy: Dude, you suck.
E-rager: omfgNOOBSTFUKKPLXEZPKGFGTHXNOOBFAG. U SUK NOOB GG. E-RAGE
Random guy: *silent*