Wild and extravagant notions can also be described as fanciful ideas, fantastical thoughts, or impractical musings. They may be seen as flighty or unrealistic, and may lack grounding in reality. Other synonyms for this phrase might include whimsical notions, improbable notions, or far-fetched imaginings. Those who have such ideas may be described as dreamers or daydreamers, and may be prone to getting lost in their own fantasies rather than focusing on practical matters. In some cases, such wild and extravagant notions may actually lead to creative breakthroughs or innovative solutions, but they can also be seen as a distraction or a hindrance to progress.