When it comes to describing a great lead guitar sound, there are plenty of synonyms to choose from beyond "sassy." For instance, you might describe a lead guitar as "fiery" or "impassioned," emphasizing the instrument's passionate, emotive qualities. Alternatively, you might opt for a slightly more restrained, textural sound, describing the lead guitar as "ethereal" or "dreamy." Other descriptors might emphasize the instrument's technical precision and virtuosity, such as "blistering" or "dazzling." Ultimately, the best synonym for a sassy lead guitar will depend on the context, the song, and the individual player's style and approach.