SFIS

A versatile acronym used in chat conversations. Commonly defined as "So Funny it's Scary!" or "So Funny I Screamed!"

Users frequently replace the final "S" with other letters such as "L" (So Funny I Laughed!) or "U" (So funny I urinated!)

As internet chatsters across the globe realize the amazing versatility of this acronym, it's only a matter of time before "LOL" becomes obsolete.
Friend #1 - "That hair on your cheek is out of control!"

Hairy Cheeked Friend #2 - "SFIS!"

Friend #1 - "No really, you need to pluck it at once!"

Hairy Cheeked Friend #2 - "SFIU!"
by SlaveToTheBean October 14, 2006
Get the SFIS mug.