DictionarycockamamieAbsurd or foolish
adjective

cockamamie

KAH-kuh-may-mee/ˈkɑːkəmeɪmi/

Absurd or foolish.

His cockamamie colander hat lets rain pour straight onto his head.

A man uses a kitchen colander as rain protection, although rain streams through its holes onto his head.
Etymology

Cockamamie may be an alteration of decalcomania, the name for transferring pictures onto surfaces. An early use apparently referred to a child’s temporary tattoo, but the connection to “ridiculous” is uncertain.

In context

PowerfulJRE10:50
There's some cockamamie new thing that they come up with and it's the type of people that are that deceptive. I mean, it's just it doesn't make sense.
Joe Rogan Experience #2479 - Bob Lazar & Luigi Vendittelli

More examples

  • This cockamamie plan will cost more than it saves.
  • Who came up with this cockamamie rule?
  • She dismisses the rumor as another cockamamie conspiracy theory.

Forms

cockamamie

Similar words

absurd
Emphasizes a lack of logic; less informal than cockamamie.
foolish
Emphasizes poor judgment rather than a bizarre or ridiculous idea.
ridiculous
Emphasizes deserving mockery; cockamamie often suggests something implausible or harebrained.