hare-brained

Adjective

harebrained (comparative more harebrained, superlative most harebrained)

1. Absurd, foolish or stupid.
   • “Now why do I get the feeling we're not talking about the harebrained plan you came up with?” “It wasn't harebrained.” “Did it have you going within twenty feet of a whorehouse at night, unchaperoned?” He knew darn well it did.2008, Sarah McCarty, Promises Reveal, Penguin, →ISBN

   Synonyms:

   addlebrained, addlepated, airheaded, bee-brained, beef-witted, soft, beefheaded, beetle-headed, birdbrained, blockheaded

2. Frivolous and silly; featherbrained or scatterbrained; stupid.
   • Her getting a parcel from a hare-brained wench at the coaches in St. John Street; her booty made at the fire, and again at Harwich, all give us excelle1722, Daniel Defoe, Moll Flanders, The Author's Preface

   Synonyms:

   absent-minded, half-brained, addlebrained, addlepated, airheaded, bee-brained, beef-witted, soft, beefheaded, beetle-headed