willy-nilly
adverb
[ wɪlɪˈnɪli ]
• whether one likes it or not.
• "he would be forced to collaborate willy-nilly"
• without direction or planning; haphazardly.
• "politicians expanded spending programmes willy-nilly"
Origin:
early 17th century: later spelling of will I, nill I ‘I am willing, I am unwilling’.