sec·ond–guess 
/ˌsɛkəndˈgɛs/ verb
sec·ond–guess·es; sec·ond–guessed; sec·ond–guess·ing /ˌsɛkəndˈgɛs/ verb [+ obj] 1 US : to criticize or question the actions or decisions of someone
▪ Don't second-guess the umpire. = Don't second-guess the umpire's decision. 2 : to try to guess or predict what (someone or something) will do
▪ He gave up trying to second-guess the stock market.
▪ Don't second-guess the umpire. = Don't second-guess the umpire's decision.
▪ He gave up trying to second-guess the stock market.
— sec·ond–guess·er noun, plural sec·ond–guess·ers [count] chiefly US
▪ He received criticism from second-guessers in the media.
▪ He received criticism from second-guessers in the media.
