From the German "Ich glaube mein Schwein pfeift" (=" I can't believe it"), which is often translated as a joke by the Germans into the wrong translation "I think my pig whistles". Mostly used by boomers.
Features or extras to make something more unique and flavorful without necessarily adding to the utility of the primary function.
Look at all those gauges! These new Pontiacs come with ALL the bells and whistles!
Windows ME is the fuckin same as Windows 98, but with some stupid bells and whistles.
Whistles... made from pennies... or so the fable goes anyhoo. Are often sold in ice cube trays and are plentiful wherever you find Ghetto Moon Pies. Delicious with Pina Coladas.