There's FOMO: Fear Of Missing Out.
I'm looking for a similar concept but for the past tense. Some concept/expression/acronym that describes the feeling of distress over having missed out on something.
For example, on the day after a party you decided not to go to, you might realize that the party was amazing.
"Oh, just found out on Twitter how good the party was. Now I'm feeling <concept>."
Another example is if you discover that your friends went to a party you were not invited to.
(So "regret" is not the right word here, since it doesn't apply to the previous example.)
Has something like this already been coined?
After some research I found the following:
FOHMO (Fear Of Having Missed Out) - It doesn't really describe what I'm looking for since in my case, you don't fear that you missed out, you know you missed out.
KIMO (Knowing I Missed Out) - Closer, but doesn't express the feeling of distress I'm looking for.
@EdwinAshworth, maybe, good pointer. At first glance the concept I'm talking about is different, but I'll have a better look.
– LLCampos Jul 27 '20 at 21:21