A group of three people who break off of the main squad in rebellion in the hopes of creating a new squad
"Oh my god Natasha, Blake and Sandra are pissed at us so they are hanging out without us"
"Are they chucking an optimistic trio??"
(n.) one who complains about things while they are occurring, but who retroactively says that everything was/is good in hindsight
Trevor, the quintessential post-optimist, couldn't refrain from telling his mother how nice Thanksgiving had been -- all this in lieu of his chronic diarrhea.