1. a person who strikes out frequently in baseball
Usage: baseball; informal
2. a person who misses or fails at something repeatedly
Usage: informal

Examples

• The rookie was known as a whiffer after striking out twelve times in his first week.
• He’s such a whiffer at the plate that the coach moved him to the bottom of the lineup.
• Don’t be a whiffer – practice your swing before the game.
• The team’s biggest whiffer finally connected for a home run.
• She called him a whiffer after he missed three easy shots in a row.