Skip to main content
Dictionary
Dictionary
Store
Blog
World
Help
Advertise
Chat
System Status
Do Not Sell or Share My Personal Information
Information Collection Notice
reCAPTCHA Privacy
Terms of Service
reCAPTCHA Terms
Privacy Policy
Accessibility
Report a Bug
Data Request
DMCA
© 1999–2026 Urban Dictionary ®
Words of the Day
Browse
Add a Definition
User Settings
Definitions by tripzilch
KYFMS
Share definition
Flag
Keep
Your Fucking
Mouth
Shut
. First rule of pranksters.
"Jamie
got
into trouble for letting
loose
those thousands of grasshoppers in the basement!"
"Well yeah, he
violated
KYFMS."
KYFMS
by
tripzilch
August 15, 2009
Get the
KYFMS
mug.