An utterance made when observing another man talking to an obviously underage girl, passing by an underage girl, or in the general presence of underage girls.
Underage girl: "Tom, want to come to my high school field hockey game today?"
Tom: "Sure, I don't have a day job."
Tom's friend: "Click click."
After sleeping together for 3 months, Sara finally asked John if they were dating exclusively. John told Sara that while he enjoyed her company, he didn't feel the click click and didn't want to date exclusively.