'willy-nilly' definitions:

Definition of 'willy-nilly'

(from WordNet)
adverb
In a random manner; "the houses were randomly scattered"; "bullets were fired into the crowd at random" [syn: randomly, indiscriminately, haphazardly, willy- nilly, arbitrarily, at random, every which way]
adverb
Without having a choice

Definition of 'willy-nilly'

From: GCIDE
  • Nill \Nill\, v. i. To be unwilling; to refuse to act. [1913 Webster]
  • The actions of the will are "velle" and "nolle," to will and nill. --Burton. [1913 Webster]
  • Will he, nill he, whether he wills it or not; usually contracted to willy-nilly. [1913 Webster]