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
1. Short version of the word mother-fucker 2. Industry nickname for San Francisco based law firm Morrison and Foerster. The firm still uses the domain name mofo.com for its IP network services. The firm actually rebranded itself MoFo for a while until it realized that the strategy was less than successful.
Text fits
Save
Cancel