When a guy gives the wert whirl whistle or yells at a babydoll for the purpose of getting attention and in hopes of a future hookup. This is usually done out of the window of a car. Typically a Pontiac Firebird, or Camaro.
99.9% a hookup never arises and it's just the thrill that keeps these going.
Good News: Johnny got laid by giving a CAT CALL. BAD NEWS: The CAT CALL was given by the JUNIOR High School, and not the SENIOR high school, so Johnny is doing 10 - 20.
Billy and Tommy got grounded when Lisa tattled on them for doing CAT CALLS on the playground.