Ink Pen by Phil Dunlap for May 16, 2011
Transcript:
tyr: the term "dunderhead" comes from the dutch word donderhood. donder is from the old german thuner, which is from the old norse word for thunder-thor. and it was because thor was such a renowned nincompoop that "dunderhead" means "a stupid or slow-witter person." hamhock: yet they still gave him a movie before you. tyr: I know! Dunderheads...
There is no dutch word called donderhood, perhaps you mean donderhoofd with an F. That would suit your description, though I’ve never heard anyone use it.