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 term or phrase used to describe how a concept, idea, or equation operates. Heard most extensively from college students studying complex educational programs such as advanced mathematics or electro optics, the “F” stands for “F**king” and the “M” stands for “Magic”. The FM Principle can be used to describe: how a professor arrived at the answer to an equation, how a professor determined your grade for an assignment, or for instance, how to derive the transfer function of a 5th order chebyshev low pass filter. When a concept or idea seems beyond the scope of reason or is considered unfathomable, it is often referred to as the "FM Principle".
Text fits
Save
Cancel