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
A mathematical term created by Foothill Algebra teacher Mr. David Kleine that means to flip the inequality symbol when changing the sign of the number to positive or negative. This term can also be used to refer to something in math that requires flipping and changing the positive/negative sign. (perpendicular lines on graphs, inequality equations, etc)
Text fits
Save
Cancel