common phrases

Have you ever heard of a famous everyday phrase, but never knew what it really means or where it came from? Well, now you can be the smartest student in class -- grab your notebook and a seat, it's time to learn some awesome trivia on "Famous Phrases!"
We asked HuffPost editors which sayings bother them the most, and found that the common thread among the responses was uselessness.
"I've got a case of the Mondays." Who wouldn't, after Sunday funday? What makes a phrase cringe-worthy? "Give 110 percent