It began being used after the word “Dotanba”, meaning last minute, and the English word “cancel/kyanseru”, were joined together.

A conversation with a friend
Woman 1: Oh, What’s wrong? Did something happen?
Woman 2: Listen to this, I had a date tomorrow, but it got cancelled at the last moment again!

使用例）友達との会話

女性１：あれ、どうしたの？何かあった？ Are, doushitano? Nanika atta?
女性２：ちょっと、聞いてよ。 Chotto Kiiteyo.
明日デートの約束してたのに、またドタキャンされちゃった！Ashita date no yakusoku shitetanoni, mata dotakyan sarechatta!

Things to be careful of when using:

The act of cancelling at the last minute is not a good act.

Therefore the person who has had an appointment cancelled usually uses it like this.
“I had an appointment cancelled at the last minute” –> “Dotakyan sareta!”.

When the person who cancelled the appointment uses it, they use it like this.
“I had to cancel at the last minute (I’m sorry~)” –> “Dotakyan shite shimaimashita.