do something willy-nilly

do something ˌwilly-ˈnilly

(informal)
1 do something whether you want to or not: She was forced willy-nilly to accept the company’s proposals.
2 do something in a careless way without planning: Don’t just use your credit card willy-nilly.
This expression is a shortened form of ‘willing or not willing’.
See also: something
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