(Informal) Like or characteristic of a goof; stupid and silly
Having or showing little sense, judgment, or sobriety; foolish, stupid, absurd, ludicrous, irrational, etc.
Eccentric or irrational:
Find another word for cockamamie. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for cockamamie, like: cockamamy, goofy, sappy, silly, wacky, whacky and zany.