JFCI 

Just Fuckin Crank It!

When I can't MTB anymore and my legs are killing me, Raf always say's to JFCI!

JFCI by morsan June 3, 2016

JFCICT 

Acronym: Jesus Fucking Christ, I Came Twice!
Generally used for expression of excitement; rarely referring to actual physical multiple ejaculations.

Dude 1: Check out the horses under that hood...
Dude 2: JFCICT!

JFCICT by walile May 19, 2010