"Saucily" is a term used to describe someone who is acting in a bold, cheeky or flirtatious manner. There are several synonyms that can be used to convey the same meaning, including impudently, coquettishly, impishly, mischievously, teasingly, seductively, playfully, boldly, flippantly, and insouciantly. Each of these words emphasizes a slightly different aspect of the speaker's behavior or attitude and can be used to indicate a range of emotions, from lightheartedness or good humor to arrogance or aggressiveness. Depending on the context, some synonyms may be more appropriate than others, allowing speakers to convey their intended meaning with precision and nuance.