Definitions by Askjeeves

Second guess 

To predict, criticize often after results are know. This normally occurs from a person who you are having a conversion with and is trying to demerit someone else or you.

From Showtime series Weeds Season 3 Episode 7-He Taught Me How to Drive By
Marvin: Are you second guessing me bitch?!

Second guess by Askjeeves October 19, 2007