1. most able to bounce or spring back when hitting a surface
Usage: superlative form of bouncy
2. most lively, energetic, or enthusiastic in manner
Usage: informal; superlative form of bouncy

Examples

• The rubber ball was the bounciest of all the toys in the playground.
• This trampoline is the bounciest one at the recreation center.
• She had the bounciest personality in the entire cheerleading squad.
• The bounciest puppy in the litter kept jumping on everyone.
• Among all the mattresses, this one felt the bounciest.
• His bounciest song always gets the crowd dancing.