wil·ly-nil·ly /
1. in a disorganized or unplanned manner; sloppily.
2. whether one wishes to or not; willingly or unwillingly: He'll have to do it willy-nilly.
–adjective
3. shilly-shallying; vacillating.
4. disorganized, unplanned; sloppy: willy-nilly work.
Origin:
1600–10; from the phrase will ye, nill ye. See will1 , nill