あっちゅう間ま

expression, noun

an instant; a split second; no time at all

Colloquial contraction of あっという間, used in casual speech to emphasize how quickly something happens.

See also: あっという間

• あっちゅ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.

• あっちゅう間まだったけど、すごく楽たのしかった。

  It was over in a flash, but it was really fun.