English version

duffer

From Longman Dictionary of Contemporary Englishdufferduf‧fer /ˈdʌfə $ -ər/ noun [countable] informal 🔊 🔊 STUPID/NOT SENSIBLEsomeone who is stupid or not very good at something
Examples from the Corpus
dufferOliver says he is a duffer, but keeps him on because he is so helpless and lonesome.The agent's an awful duffer when it comes to dates.By refraining I have no doubt I shall receive the silent blessings of the multitude of duffers among whom I find myself.I was never your prototypical duffer.I think a lot of people feel vaguely when they see two duffers marrying that the duffers must prefer it that way.
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