Clichés and idioms are bad, bad, bad. Most of the time. As a general rule, don't use them in your writing—especially in your narrative. It's okay to sometimes include them in dialog, because that's how people talk. But it's better to come up with something fresh and new, and not to use them at all.
Except as writing prompts, where a good cliché can go a long way. (heh)
Okay, so the prompt is:
Find a cliché or idiom that suggests a story line to you. Then write a short story or a few paragraphs using the cliche as either the title, the first line, or the ending punch line.
For example, you might start with, "It was a slip of the tongue, I promise!" or "Jason stared at me with cold, dark eyes. This was my friend. I couldn't believe it. He was going to throw me to the wolves." (Or if you're Melanie G, you could say, "...he was going to throw me to the werewolves..." :)
For lists of cliches and idioms, click HERE or HERE.
If you post your story on your blog, feel free to leave a link in the comments section.