What is no siree bob?

"No siree Bob" is an American colloquialism that emphasizes a negative response, rejecting a statement or suggestion. The phrase is often used to convey strong disagreement or refusal, and is similar in meaning to phrases like "absolutely not" or "no way." "Bob" is often added to the end of the phrase for added emphasis. The origin of the phrase is unclear, but it has been in use in American English since at least the mid-19th century.