A cutesie post-feminist term for having to say whatever inane drivel that pops into your vacuous head, "to get it off your chest". See also Tourette's, Vagina Monologues.
I had to let Claire O'Malley go today.
Having subscribed to some new-found "chestist" belief of having to "get everything off her chest" and "speaking her own truths" does not give her a free pass to make offensive remarks about co-workers or management. If anyone has a problem with this decision, don't let the door hit you in the ass.