JBR = JonBenet Ramsey
https://en.wikipedia.org/w/index.php?title=Killing_of_JonBen...
https://en.wikipedia.org/w/index.php?title=Killing_of_JonBen...
Why, OP, why? How much self-awareness does it really take to realize JBR is a non-standard acronym people won't recognize? It almost feels like a superpower that I take an extra half-second to think about what jargon the average person needs to have defined.
Obligatory xkcd: https://xkcd.com/2501/
So you don't need to explain it by any specific failing of the OP, it's common among the lucid as well.