Quote from Adrian Monk in Mr. Monk and the Naked Man
Captain Stottlemeyer: Officer! You got that fingernail? Officer: We found it on that porch over there. Adrian Monk: Who lives there? Captain Stottlemeyer: His name is Chance Singer. We haven't found him yet. Natalie: Officer, XYZ. Adrian Monk: XYZ? Natalie: Examine Your Zipper. Adrian Monk: Oh, I get it. XYZ.