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
Kari Effect (noun) Pronunciation: /ˈkɑ r.i ɪˌfɛkt/ 1. The involuntary act of smiling so hard that one’s jaw pops, typically caused by overwhelming joy, affection, or attraction. 2. (informal) The emotional reaction brought on by someone whose presence or message triggers an uncontrollable grin. Origin: Coined humorously to describe a smile so powerful it becomes physically audible; named after Kari, the person capable of inducing such reactions.
Text fits
Save
Cancel