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
Also "hop up." Used when referring to airsoft guns. It is best described as the backwards spin that the gun is designed to put on the bullet, making the bullet spin the wind below it during "flight" so that it doesn't descend as fast. A lot of airsoft guns have too much hopup, so the bullets might travel upwards at times.
Text fits
Save
Cancel