The quote "On the toodle last night, and not feeling quite the thing today?" from Georgette Heyer's book "Frederica" reflects a sense of lightheartedness in the context of social gatherings. The phrase suggests a whimsical or carefree approach to life, hinting at the fun and perhaps excessive nature of a previous evening's festivities that leads to a less-than-ideal feeling the following day.

This line encapsulates a common experience of overindulgence and the subsequent realization of its effects. Heyer’s witty dialogue often emphasizes the charm and quirks of her characters, making them relatable and engaging. The quote not only highlights the humor in social situations but also sets the tone for the interactions that unfold in her novels.