n.1.A stupid, blundering fellow.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
He deals lightly with familiars such as Kim Philby, Alan Turing and Sir Stewart Menzies (the famously dim head of M16) but devotes an entire chapter to Operation Blunderhead, a sublimely named Special Operations Executive (SOE) scheme that involved parachuting an obvious fantasist called Ronald Seth into German-occupied Estonia.
Tory Party Chairman, Brian Mawhinney, deserves to be labelled a blunderhead for bringing out a Conservative newspaper Look!, featuring people who say they are going to vote Labour (Mirror, April 18)