duffer Synonyms

bad coin bumbler goof bonehead klutz kookaburra foul up dope stumbler pedler peddler goofball slob butterfingers spurious coin false coin base coin twonk twerp stumer wazzock bohunk alec wally oaf numskull drongo donkey dolt clod chump chapman butcher bungler botcher blunderer dub dullard dunce muddler mismanager marplot lump lummox incompetent ignoramus idiot fumbler fool blockhead