Meanings

1. auxiliary verb, godan verbto do completelycontraction of ..て or で plus しまう
2. auxiliary verb, godan verbto do accidentally; to do without meaning to; to happen to do

Examples

• いくら器だけを日本一にしても、中身が三流やったらな～んの意味もないんちゃうの？

  The container may be the best in Japan, but if the contents are third class, then isn't it completely meaningless?

• 落第しちゃう！

  I will be a repeater!

• 退屈しちゃったよ。

  I'm bored.

Sentences from Tatoeba (CC BY 2.0 FR).