luser

noun

facetious a user of a computer system, as considered by a systems administator or other member of a technical support team

Word Origin for luser

C20: a blend of loser + user

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012