To have an obsession and feel the need to comment over something (i.e Liverpool fc) This act is carried out usually to and gain more friends on Facebook.
Did you hear that guy go on about the game last night. He was "Horse Ranting"
To rant, Swear and downright abuse others verbally who are beating you during game play of any online console game, IE: Call Of Duty: Modern Warfare 2, Battlefield:Bad Company.
Oh that guy in that last game was Horse Rant quite bad. All they did was Horse Rant: swear and abuse me verbally.