あっという間ま

expression, noun

an instant; a split second; no time at all

Used to describe something happening extremely quickly, often in the phrase あっという間に (in the blink of an eye). The literal meaning is 'the time it takes to say ah!'.

See also: あっという間に

• あっという間まに夏なつ休やすみが終おわった。

  Summer vacation was over in the blink of an eye.

• 彼かれはあっという間まにその問もん題だいを解といた。

  He solved the problem in no time at all.