> 
> "If I'm having lessons with you, I won't have to do Occlumency lessons
>  with Snape, will I." ''Professor Snape, Harry — and no, you will not."
>  "Good," said Harry in relief, "because they were a —" He stopped,
>  careful not to say what he really thought.
> 
> 
> "I think the word 'fiasco' would be a good one here," said Dumbledore,
>  nodding.
> 
> 
> 

In that excerpt, Dumbledore replaces a word Harry has not said with 'fiasco'. Not being a native speaker myself, however, I've been wondering: what's the word that Harry would have said, had he not considered it inappropriate?