Today's "word" is an acronym: FOMO.
I have to concede that I didn't know this word before. It's perfect for me! FOMO stands for Fear Of Missing Out. Oxford has chosen this as its definition:
anxiety that an exciting or interesting event may currently be happening elsewhere, often aroused by posts seen on a social media website.
Here is an example of the acronym in a sentence, via Urban Dictionary:
In the event that you speak this term, it is pronounced "Foe moe." It rhymes with bobo.Even though he was exhausted, John's fomo got the best of him and he went to the party.
Buzzworthy words added to Oxford Dictionaries Online – squee!, Oxford Dictionaries
FOMO, Oxford Dictionary
FOMO, Urban Dictionary
The GQ Guide to Getting Over #FOMO, GQ