Can someone please translate this note to a friend? (Characters identified: 你是我的嘘声) Someone wrote this to a friend of mine.  Can someone please translate it?
It means :


  You are my hiss.


The characters on the strip of paper don't look like a native speaker's work. Normally even foreigners will attain some ease in pencilling out frequent characters like 我。 I therefore  assume a foreigner with very little practice wrote this and possibly confused some characters.