1. superlative form of barny; most resembling or characteristic of a barn; rustic or rural in appearance or manner
Usage: informal; chiefly British
2. superlative form of barny; most eccentric, crazy, or silly in behavior
Usage: informal; slang; chiefly British

Examples

• That's the barniest outfit I've ever seen—complete with overalls and a straw hat.
• His barniest ideas always seem to work out somehow.
• She gave the barniest laugh when she heard the joke.
• The barniest part of the countryside still has farms from the 1800s.
• He's acting barniest when he's had too much coffee.
• That's the barniest suggestion you've made all week!