meaning: If you say something is nothing to write home about, you mean it isn't very important or it isn't very good.
For example:
- We saw a movie today and it was nothing to write home about. It was just a typical action movie.我們今天看了一部電影而這部電影並不值得特別一提。不過是部典型的動作片。
- Helen said her date with the guy she met online was nothing to write home about, and she probably wouldn't see him again.海倫說她與網友約會沒什麼好說的,而且她也可能不會再見他一面。
Reference: Englishclub.com Yahoo奇摩字典