[ubittibu]

Also, which is the source of this etymology for “carusella”?

I’m Italian, and it sounded very strange, so I made a little research. Treccani dictionary, says the word comes from neapolitan “carusiello”, ball of clay, equivalent to small head of caruso, caruso means boy in neapolitan. Because players originally threw each others clay balls. This makes lot more sense.