1. excessively inflated or filled with air or fluid beyond the proper or safe level
Usage: commonly used with tires, balloons, or athletic equipment
2. overly excited, energetic, or stimulated; hyped up
Usage: informal; often used to describe people or animals

Examples

• The basketball was overpumped and bounced too high off the court.
• My bike tire was overpumped, so I had to release some air before riding.
• The kids were overpumped after eating candy and couldn't sit still.
• He felt overpumped with adrenaline before the big game.
• The overpumped balloon finally burst when we squeezed it.
• She was overpumped about the concert and couldn't sleep the night before.