From the MMORPG 'World of Warcraft' a 'retnoob' is a slang phrase for a player of the 'Paladin' class who has placed his or her talent points in the 'Retribution' talent tree. It is thought by some that the Retribution tree is an 'easy-mode' for paladins and hence is used by younger players.
by Xerophon August 23, 2006