I sometimes have difficulty figuring out what the letters people use in place of phrases mean. I often have to use an 'acronym finder' to tell me. IIRC, YMMV, DD, RL, and so forth... ('If I recall correctly', 'Your mileage may vary', 'Darling daughter', 'Real life'..) There are far too many to know.
In the beginning here I didn't know what most of the fig acronyms were either. What the heck did VdB mean or KB or CdDB or MBVS/MVSB... If no one in the thread wrote out the entire name and I was interested, I asked. I figured if I didn't know, there would be others reading who wouldn't know either. Of course now I also use fig acronyms... and so it goes. (Lol, there currently is one in my fig wish list.)