Plural of baloney; slices or pieces of baloney sausage, or plural of an alternative spelling of 'baloney' meaning nonsense.
From baloney (the sausage/nonsense word), derived from Bologna, Italy, the city famous for mortadella and sausages. The spelling 'baloney' became standard in American English.
Baloney is funny because it started as a real thing—the sausage from Bologna—but Americans started using it to mean 'nonsense' by the early 1900s, maybe because cheap sausage was seen as inferior or fake!
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