Answer: wolfwhistle

AnswerCrossword Clue
WOLFWHISTLE

Girl watcher's approval

WOLFWHISTLE

Unrefined appreciation for a looker

WOLFWHISTLE

Shrill "compliment" to a pretty woman

WOLFWHISTLE
It originated from the General Call made with a boatswain's pipe
WOLFWHISTLE
Sound from an ogler
WOLFWHISTLETwo-note male come-on
WOLFWHISTLEWould-be Romeo's call
WOLFWHISTLEFlirting sound
WOLFWHISTLELupine come-on?