WILLY-NILLY Meaning of WILLY-NILLY in English ■ adverb1》 whether one likes it or not. 2》 without direction or planning; haphazardly.OriginC17: later spelling of will I, nill I 'I am willing, I am unwilling'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004