WILLY-NILLY Meaning of WILLY-NILLY in English [wil.ly-nil.ly] adv or adj [alter. of will I nill I or will ye nill ye or will he nill he] (1608) 1: by compulsion: without choice 2: in a haphazard or spontaneous manner Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012