A cockamamie is a ridiculous or impractical idea. Sometimes cockamamie ideas are funny, but other times they are just plain stupid.
His cockamamie idea was to build a wall to keep the immigrants out.
The cockamamie idea was to build a machine that could read minds.
adjective
informal term for ridiculous and implausible
Synonyms:
1
Experts are hardly immune to cockamamie theories.
2
But feel free to nominate the cockamamie BS.
3
I'm not adding some new cockamamie rule.
4
Cockamamie has nothing whatever to do with roosters, talking or otherwise.
5
The more I think about it, the more cockamamie the idea becomes.