One meaning of the rarely used acronym GTFI is "Google the fucking Internet". It is a modern variation of "read the fucking manual" RTFM. It is commonly used when someone asks a question that is easily answered with a little searching.
Hey man, what is that website 'urban dictionary'?
"Get the fuck in"
<someguy> when I tell you to, go to #lolol
<someguy> ok ready?
<someguy> now! go!
<someguy> What the hell? I told you to get in the channel. GTFI
A rallying cry, "Get the fuck in," is something you yell at friends in moments of triumph... as if to say, "come on, this great, get excited!"
His Lordship Montavio Wingo received a pair of new top hats in the post. Upon gifting one of the hats to his friend, Sir Alphonso DiNardi, Lord Wingo demanded they wear them out together. "GTFI (get the fuck in), DiNardi," Lord Wingo howled as they left the house in the matching hats.
Acronym that stands for "Get the fuck in." Its use is the opposite of the popular "GTFO." Used when one wants someone to enter the current conversation in a room.
Dude: Man, Guy would have some interesting things to say about this!!!
Man: Where is Guy?
Dude: It says he's in the room, he must be lurking...
Man: GTFI GUY