1. a person or thing that causes disappointment, sadness, or a loss of enthusiasm
Usage: informal; often used in the phrase 'what a bringdown'
2. a depressing or unpleasant experience or event
Usage: informal; slang

Examples

• Losing the game in the final seconds was a real bringdown for the team.
• That movie was such a bringdown—I expected it to be funny.
• Having to cancel the trip was a bringdown after weeks of planning.
• His negative attitude is a total bringdown at parties.
• The rainy weather turned out to be a bringdown for our outdoor event.
• Getting a bad grade on the test was a bringdown, but I'll study harder next time.