Idiom of the Day

British slang for a fool or simpleton but with connotations of disparagement because a ‘wally’ is usually quite obnoxious. It dates from the 1970s and the origin remains obscure. Some suggest that it may derive from earlier working class slang where a ‘wally’ meant a pickled gherkin or cucumber flavoured with dill, the aromatic herb, used in such pickles. See also Dill.