RTFM = Read the f***ing manual
I can say to someone "please RTFM" which would mean "please Read the f***ing manual"
How do I say it in short form when I want to say I have done it?
Long: "After Reading the f`***ing manual, I understood the concept"
Short: "After RTFMing, I understood the concept" Or "After RingTFM, I understood the concept"?
I mean to text, not say it aloud.
Edit-
From my intuition, I think the word RTFM (a group of words) acts a verb in the combo. And that makes sense to add ing after the word. RTFMing.
Some elaboration would be appreciated if that seems a good point.