An ultracrepidarian—from ultra- (“beyond”) and crepidarian (“things related to shoes”)—is a person considered to have ignored this advice and to be offering opinions they know nothing about.
The word is derived from a longer Latin phrase and refers to a story from Pliny the Elder
The phrase is recorded in Book 35 of Pliny the Elder’s Natural History as ne supra crepidam sutor iudicaret[1] (“Let the cobbler not judge beyond the crepida”) and ascribed to the Greek painter Apelles of Kos. Supposedly, Apelles would put new paintings on public display and hide behind them to hear and act on their reception.[2] On one occasion, a shoemaker (Latin sutor) noted that one of the crepides[a] in a painting had the wrong number of straps and was so delighted when he found the error corrected the next day that he started in on criticizing the legs.[2] Indignant, Apelles came from his hiding place and admonished him to confine his opinions to the shoes.[2] Pliny then states that since that time it had become proverbial.[2]
I worked a precinct that was right next to a huge nursing home. One guy who was 98, came in and after getting his ballot fell down and was unresponsive. Luckily the home had their own staff join the groups that came to vote and resuscitated him and he continued exactly where he left off at tortoise pace.
Also lots of people who were not registered or at the wrong polling place but insist on voting anyways despite me patiently explaining and showing them how to solve the issue. They demand to “vote” so they get a provisional ballot that we dutifully process which likely will be rejected. All of them are certain we are stealing their ballot, or trying to keep them from voting. I always say to them, “you seem like you are someone who knows a lot about the election process and has the time, we need people like you to volunteer” while offering them the volunteering paperwork. They leave pretty quickly after that.