1. most foolish, silly, or crazy (superlative form of barmy)
Usage: British informal

Examples

• That’s the barmiest idea I’ve ever heard!
• Of all his crazy schemes, this one is the barmiest.
• She came up with the barmiest excuse for being late.
• The barmiest part of the plan was thinking it would actually work.
• His barmiest suggestion was to paint the house bright purple.
• That was the barmiest thing anyone said during the entire meeting.