A Moderator of the RuneScape official forums. Similar to a P-Mod, F-Mods are normal players, given several extra abilities such as being able to move, lock and hide threads, and being able to give temporary mutes from the forums. They try their best to keep the forums clean, while also posting as a normal poster.
Their actions are closely monitored by Jagex.
"Dude! I just got temp ban from the forums by an F-Mod!"