1. weights used for exercise, typically consisting of a short bar with a weight at each end
2. stupid or foolish people
Usage: informal; potentially offensive

Examples

• She lifted the dumbbells above her head during her workout.
• The gym has dumbbells ranging from five to fifty pounds.
• He uses dumbbells to strengthen his arm muscles.
• The personal trainer recommended starting with lighter dumbbells.
• Those dumbbells don’t even know how to use a computer.
• Don’t be such dumbbells and think before you act.