A sexond-guesser (sorry, I mean second-guesser) is a person who second-guesses everything they say.
They are typically overthinkers and don't usually have the best self-confidence, well at least not all the time.
They might also be prone to saying sorry, and thanks a lot but also may or may not counteract that with rude behavior in a different situation.
A sexond guessor typically has very good spelling and grammar, just chooses to misuse it.
A second guesser may hear voices and have delusion-like thought interuptions, either before or after they talk.
This at times, may cause the second-guesser to say things like "What did I just say...!" and "Oh no...!"
A second guessor usually does well in work situations, with other people as long as they keep quiet.
Their bosses frequently either love or hate them.