Also found in: Acronyms.
An initialism of "for your further information," used especially in online communications. I'm through with you, Jake. Oh, and FYFI, I'll be coming around tomorrow to pick up my things, OK? Well FYFI, I was hired as a contractor for this job, and that means I can quit whenever I please.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.