Wiktionary
second-guesser
n. (alternative spelling of second guesser English)
Usage examples of "second-guesser".
Some second-guesser back at Fleet might jump to the conclusion that somehow the pirates were behind the slaughter, and the "aliens" were some sort of diversion.
Jamieson would prefer to have a knowledgeable systems man in the right seat any day over a second-guesser or a self-anointed tactics expert.
The second-guessers would have it that I was remiss in not advising caution more strongly.
Furthermore I doubt if some of the smart second-guessers know all the facts.
The television crews went home, and second-guessers around the world explained how the affair should have been handled.