bat one thousand

do the right or correct thing each and every time. From the sport of baseball where the percentage of hits of the ball by the batter is kept in 3 figures (e.g. if a batter hit the ball fifty percent if his times at bat his percentage would be written .500 and would be said "five hundred" in the language of the sport). Thus for a person to hit 100 percent of the time (1.000) would be to bat "one thousand."