What word describes a behavior that is bold, often in a disrespectful manner?

The term that best describes a behavior that is bold, often in a disrespectful manner, is "impudent." This word specifically refers to showing a lack of respect or rudeness, especially when someone is behaving in an overly brazen or audacious way. It embodies both the sense of boldness and the negative connotation of disrespect, making it particularly suitable for describing such behavior.

In contrast, "impertinent" also conveys a sense of disrespect but may be used in slightly different contexts, often focusing more on being rude or intrusive rather than on boldness itself. "Indecent" pertains to behavior that is inappropriate or obscene, which is not inherently linked to boldness or rudeness in the same way. "Innocent," on the other hand, describes a lack of guilt or wrongdoing and clearly does not relate to boldness or disrespectful behavior at all. Thus, "impudent" stands out as the most fitting choice for the described behavior.