When one eats spaghetti all alone, while also being sad and depressed, you can say it's sadghetti. 

在难过沮丧时，一个人独自吃意大利面，这时候你就可以说，我吃的是“伤心意面”。

例句：

"How was dinner last night?" 

“你昨晚吃得如何？”

 "I had sadghetti....." 

“我吃了伤心意面。”