Definition & Meaning of "baloney"in English

What is the origin of the exclamation "baloney" and how is it used?

Baloney is a slang exclamation used to express disbelief, frustration, or disagreement. It originated in early 20th-century American English, likely from the cheap sausage called bologna, which became a metaphor for nonsense or rubbish. People used it to call out lies, exaggerations, or poor ideas in a casual, sometimes humorous way. Today it is informal and slightly playful, not harshly offensive, though it signals skepticism or mockery.