The phrase is used to proclaim the satisfaction of an express condition, the occurrence of which triggers a duty to "go." Should an individual fail to "go" upon the satisfaction of the applicable condition, the individual will be found in breach.
*Game point and Newman steals the ball*
Joe: "NOW WE GO!"

Terry: "Did you hear that Mulligan's is giving out free beer to law students?"
Joe: "NOW WE GO!"

Joe: "Where did they say we were supposed to put up these flyers?"
Chris: "71st and Jeffery"
Joe: "NOW WE GO!"
by NDLS Gunner 4LYFE February 26, 2010
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