Sbottiglia literally means "to uncork" a bottle. It's an interesting and somewhat rare verb to find in song lyrics.
In the context of this song, it's used metaphorically in the phrase "sbottiglia il messaggio" (uncork the message). It's a colorful way of telling someone to reveal or spill out the important information they're holding back, much like uncorking a bottle releases its contents. This vivid imagery makes it a memorable word.
Fred Buscaglione's "Ciao Joe" is a fantastic, playful warning to an old friend, Joe, who seems to be back in town and looking a bit too flashy. Fred spots Joe, "in quadro col turismo" [in the picture with tourism], all dressed up and ready to impress. He's curious what Joe is doing on these beaches, especially with his "doppio petto facile" [easy double-breasted suit].
Fred quickly gets down to business, asking about the "ragazzini dell'anonima assassini" [kids of the anonymous assassins] and reminding Joe of the good old days in Chicago and New York, when "Al Capon faceva il re" [Al Capone was king]. But things are different now. Fred warns Joe to be careful, because "qui son tutti seri" [everyone here is serious] and there's even "l'anonima banchieri" [the anonymous bankers]. He tells Joe to "fare la tartaruga, vacci piano" [be a turtle, go slow] because "Questa terra non è come la bionda del Roxy bar" [This land isn't like the blonde from the Roxy bar] – it doesn't want him. It's a blunt, funny, and slightly menacing message: "accà, nisciuno è fesso" [here, nobody's a fool].