Other forms: fantasticating; fantasticated; fantasticates
To fantasticate is to imagine or invent fanciful, unrealistic, or extravagant ideas. When telling a story, you might fantasticate by adding whimsical or even bizarre details.
It's not a great idea to fantasticate when trying to convince someone that you're telling the truth. But if you're trying to create a surreal work of art or an otherworldly story setting, fantasticate to your heart's content. When you fantasticate, you let your imagination run wild, creating something beyond the realm of normal, practical, or believable. Like its parent word, fantastic, this word comes from a Greek word originally meaning "to make visible" and later, "to have visions."