There are dozens of verbal and non-verbal cues that suggest a person is fibbing, says Bella DePaulo, PhD, a psychologist specializing in relationships. So if you can handle the truth, here are the signs to tell if they're lying:

• Ever heard your guy start a sentence by saying, "The truth is," or "Let me be honest with you"? If so, an alarm should go off in your brain.
• If your wife says she can't remember how she spent that $200, search her eyes for the truth. It's not as noticeable as a twitch or a blink, but when someone is hemming-and-hawing, their pupils can dilate dramatically.
• Your best friend tells you how great her date was last night, but you heard she was stood up. When you meet, she mumbles a few words about her date and falls silent. The total amount of time a fibber speaks falls short of someone who's speaking honestly.
• You can actually hear it in his voice. If he's lying, he'll talk in a higher pitch than usual.
• Lips can reveal a lot about a person. According to DePaulo, liars are more likely to press their lips together due to stress and tension in the face.
• There's truth to the notion that if a story doesn't add up, it's made up.
• Liars are more likely to repeat words and phrases, says linguist Cati Brown of the University of Georgia. "Repeating the same phrase is usually a sign that a person has rehearsed their conversation."