step by step Antonyms

in a sec out of the blue in two shakes In the blink of an eye in one stroke in a snap in a jiffy full tilt cold turkey before you can say knife in two shakes of a lamb's tail in the twinkling of an eye before you can say Jack Robinson at the drop of a hat lightning fast on the spur of the moment in a wink at one sitting in a second in a tick in no time at all before one can say Jack Robinson entirely without warning in a blink as fast as greased lightning in less than no time very quickly in a trice at the speed of light before you know it in one fell swoop at one stroke sudden sharp saltatory quickly promptly meteoric instantly immediately dynamic discontinuous changeable acute abruptly swiftly volatile instantaneously at full tilt all of the sudden