What it means
A menty b is a mental breakdown, said lightly and half-jokingly about a small meltdown over everyday stress. Five unread emails and a flat tyre and you are having a full menty b.
Usage examples
"The printer jammed again and I had a little menty b."
"She is having a menty b over the seating plan, give her a minute."
"I spilled coffee on my laptop and had a tiny menty b before 9am."
"He's having a full menty b because the group chat picked the one night he can't do."
Where it comes from
Cutesy shortening of mental breakdown to menty b, defusing the heaviness by making the whole thing sound almost playful.
