Cockamamie

I think it could be either:

Which length description are you looking for?:

inane

'cockamamie' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for inane that I've seen before include "Lacking meaning" , "Mindlessly silly" , "Fatuous, vacuous" , "Fatuous, mindless" , "Puerile" .)

I've seen this clue in The New York Times, The Wall Street Journal and the USA Today.

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