A highly effective means of pointing out hot members of the opposite sex (or the same sex if you slide that way) to your associates (usually in public) without drawing undue attention to oneself. It works like this: The person calling the clock is always facing 12 o'clock and so a honey off to your left is at your 9 and so on. For experienced clockers, there are added terms such as tight (close), deep (far), High (above you), and Low (below). It's important to remember not to shift around to much immediately after calling a clock, so as to avoid undue confusion and back-of-the-head slapping.
God damn it, I'm calling out a 3:30 gentleman, can I get an Amen?