The term referring to when a football coach initially tells his playmaker player to not do anything stupid (the "no no" part) but when the player does not listen, and ends up making a huge play, the coaches new words are "Go Go!"
Defined as by John Madden, 11-12-06
*player catches ball in the middle of the endzone on a kickoff, starts to run towards the other end of the field*
Coach: Jackson.. NO NO!
*player reaches the 50 yard mark running full speed with 2 opponents behind him*
Coach: GO! GO!
*player scores touchdown*
Coach: I knew he would do that all along, good play call, 'eh? The ol' No No Go Go trick.