The innate sense that most males are born with that tells them who is a slut, who isn't, and how much of a slut that person is. Often expressed with beeping noises.
Dude 1: Look at that chick wearing the tube-top!
Dude 2: Slut-ometer is on!
Dude 3: beep-beep-beep...
(girl gets closer)
Dude 3: BEEPBEEPBEEP
by WadeWilson January 27, 2010

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