/kok"euh may'mee/ , adj. Slang.
ridiculous, pointless, or nonsensical: full of wild schemes and cockamamie ideas.
Also, cockamamy .
[ ‡1940-45, Amer.; in orig. sense, paper strip with an image which could be transferred to the skin when moistened, appar. alter. of DECALCOMANIA; sense "ridiculous" prob. by assoc. with COCK-AND-BULL STORY, POPPYCOCK, etc. ]