I bet there's a phrase that instantly cracks you up. It's probably just a few words—a reference to a place or a person—that instantly reminds you of a funny situation in your life. When you hear that magic phrase, you'll get the giggles uncontrollably, and if your friends are nearby, good luck trying to stop laughing for the next few hours. Getting the giggles is one of the best feelings in life… unless you happen to be at a funeral, or a play, or a serious wedding speech. You know, one of thos…