RTFSC

Read the fucking source code.

From "Lessons Learned from 30 Years of MINIX" by Tanenbaum, A.S., 2016:

Linus Torvalds' second posting to comp.os.minix was on April 1, 1991, in response to a simple question from someone else: "RTFSC (Read the F***ing Source Code:-)It is heavily commented and the solution should be obvious ... "

RTFSC by ronnosexual August 27, 2022

RTFC 

Used when a person gets their hands on code and doesnt know what it does. Hint "Read the Fucking Code"

<Zook> Heres the exploit
<Annonymous> What does it do?
<Zook> rtfc :/

RTFC by z00k July 27, 2005

rtfgcbveydhxnwusjzmqiakolp 

The sign that you are cunning and you have used epic skill to outwit every other bored person on earth other than the person who is writing this. This was either found by random typing or by absolute cunning in a strategy that you now know.

I used epic skill to find rtfgcbveydhxnwusjzmqiakolp in the urban dictionary!

rtfgcbveydhxnwusjzmqiakolp by Bunnies rule! April 5, 2021

RTFS 

Acronym:
Read The Fucking Source

Relating to computer programming, tells someone to look at the obvious (the source) to find an answer.

Derived from RTFM

a>What functions are available in the ABCD library?
b>RTFS, noob!

RTFS by Sol Invictus January 18, 2005

RTFC 

Read The Fucking Card

Popular among gamers and used as an insult towards someone who doesn't understand what their own cards do when played.

I'll block with my Goblin Raider.

Goblin Raider can't block.

Says who?

RTFC, dipshit.

RTFC by Yawgmothguy November 11, 2004

RTFCL 

Read The Fucking ChangeLog

Variation of RTFM, adjusted like that after Opera 10 alpha was released and everyone asked questions that were already answered in changelog

<white_eagle> and the names of the chat accounts not appearing?
<LarsKL> RTFCL

<werwolf> encoding is broken in html-emails
<Mitchman-> werwolf: RTFCL.

RTFCL by timsp December 16, 2008

RTFS 

Read The Fucking Sticky

Guest: i cant find out where or how to start the game theres no icon nad im starting to not know what im doing... lol

User: RTFS. (Possible link to thread with stickies)

RTFS by An8BitWarlock July 26, 2005