Joe,
I know what you mean about the name.  When I was a kid, my Papaw would correct me that a "slingshot" was the name for the leather thong with a pouch that you slung around to throw the rock... like David used to kill Goliath, but that a "flip" was the name for the type that used rubber bands.  That didn't keep me from calling my rubber band type device a slingshot, but I do remember to this day that the proper name is "flip".  He has been gone for over 20 years now, and it still makes me smile to remember him.
Michael