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
When the ghost or spirit of the number π would appear to some lucky mathematicians or math educators to reveal to them some of her sexy numerical, geometric, or trigonometric properties—when they least expect her to visiting them, while experiencing an aha!
Text fits
Save
Cancel