English

Definition of cockamamie adjective from the Oxford Advanced Learner's Dictionary

 

cockamamie

 adjective
(also cockamamy) adjective
BrE BrE//ˈkɒkəmeɪmi//
 
; NAmE NAmE//ˈkɑːkəmeɪmi//
 
(North American English, informal)
 
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(of an idea, a story, etc.) silly; not to be believed Word Origin 1940s (originally denoting a design left by a transfer): probably an alteration of decalcomania, the process of transferring a design from paper to porcelain or glass.
See the Oxford Advanced American Dictionary entry: cockamamie