CTFI 

Come The Fuck In, opposite of Get The Fuck Out. Usually used after being told 'Tits or GTFO' previously.

Guy 1: Tits or GTFO
Guy 2: Dude, I just got pics of her tits last night, can i CTFI now?

CTFI by maynor May 23, 2011

ctfi 

Clue The Fuck In - for all the texters out there.

Read the damn article, ctfi. You can't just read the headline, look at the pictures, and make an intelligent comment! You look like a 'tard!

ctfi by Gee Jay February 24, 2023