What is waxing poetic?

"Waxing poetic" is an idiomatic expression used to describe someone who is speaking or writing in a very enthusiastic, sentimental, or flowery manner, often about a subject they are passionate about. The phrase combines the idea of "waxing," which means to grow or increase in intensity, with "poetic," suggesting that the language used is expressive, lyrical, or imaginative. This style of communication often involves elaborate descriptions, metaphors, and a heightened emotional tone. It can be used both sincerely, to celebrate the beauty or significance of a topic, or sarcastically, to highlight someone’s excessive or overly romanticized expression.