The saddest words of tongue and pen...
"For of all sad words of tongue or pen,
The saddest are these:
'It might have been!'" -- John Greenleaf, Maud Muller, 1856

Now go look it up, bitches.
by Tenacious Faulker April 16, 2009
A silly little word made by Neil Cicierega from the song Sky Is Not Blue. Meaning a "past possibility that no longer applies."
"I might have been a has-might-have-been"
by MindlessAnimator January 27, 2023