The idiom is " all the bells and whistles ". It means, all the extras possible.

For example, the new car came with all the bells and whistles. It was loaded with every option possible.

Smash - 2012 The Bells and Whistles 2-8 is rated/received certificates of:

USA:TV-14

Horns- Bells- Whistles- - 2012 was released on:

USA: 13 April 2012 (Athens International Film and Video Festival)

Anything you can add to improve it has been done.

The idiom " all the bells and whistles " means, all the extras possible.

For example, the new car came with all the bells and whistles. It was loaded with every option possible, and a lot of flashy unnecessary gadgets as well.

"Bells and whistles" are extra thing that don't really add anything to whatever the thing is - they're extras, like icing on a cake. For example, if you have a car that has XM radio, a navigator system, bluetooth, and a video player, it has a lot of bells and whistles on top of being just a car.