Source : WordNet®

like a shot
     adv : without delay or hesitation; with no time intervening; "he
           answered immediately"; "found an answer straightaway";
           "an official accused of dishonesty should be suspended
           forthwith"; "Come here now!" [syn: {immediately}, {instantly},
            {straightaway}, {straight off}, {directly}, {now}, {right
           away}, {at once}, {forthwith}, {in real time}]