Skip to main content
Dictionary
Store
Blog
World
Help
Advertise
Chat
System Status
Information Collection Notice
Trademark Concerns
reCAPTCHA Privacy
Terms of Service
reCAPTCHA Terms
Privacy Policy
Accessibility
Report a Bug
Data Request
Contact Us
Security
DMCA
© 1999–2026 Urban Dictionary ®
Mugs
Tees
Hoodies
Pro Customization
Create unique products with your own words and definitions
Preview
Personalize Your Design
Your Word
Your Definition
The part of the human body that tightens and moves down to create lower air pressure in the lungs than in the outside environment, allowing air to move into the lungs. This part then relaxes and moves back up, generating higher air pressure in the lungs than the outside environment, forcing carbon dioxide out of the lungs. This part also separates the chest cavity (cardiovasuclar and respiratory) from the abdominal cavity (digestive system), which is why your chest expands as you breathe. Also that fancy part of an air horn that rapidly vibrates in response to air movement, generating that screeching sound.
Text fits
Save
Cancel