Boy was I wrong. (I guess those are woof whistles?)
The cat call traces its origin back to Shakespeare's time (mid-1600's), where the phrase meant to boo bad acting.
|file: Wikimedia Commons public domain|
It came to be known as a cat call because the booing signified the audience's opinion: that the acting sounded as bad as a fence full of yowling cats. (OUCH)
|maybe not such a good name for a song?|
Etymology Online, Wiki Answers and Memidex Online Dictionary