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
To derp out is to have a ballistically fun time with your friends, and things might get weird in one way or another, meaning you might do something that you maybe didn’t expect to be doing when you were sitting in your 2pm Supply Chain Lecture earlier that day.
Text fits
Save
Cancel