Acronym: Careless Rarely Useful Meaningless Person.
If you have a project that really needs to be completed successfully and quickly - the one guy you really DON'T want on the job is a C.R.U.M.P.
Boss: "Hey Stuie what the fuck's happened to this job? It was looking good, on time and on budget - now it's all gone to shit"!
Manager: "Sorry but it wasn't my idea to put T***y in charge. Everyone knows he's a proper C.R.U.M.P."