"Dashing off" is a phrasal verb that is commonly used to describe the act of writing something quickly and without much thought or effort. There are many synonyms for this phrase, depending on the context in which it is being used. Some common alternatives include "jotting down," "penning quickly," "scribbling," "writing hastily," "rushing to write," "sketching out," and "drafting rapidly." Each of these synonyms conveys a slightly different meaning, but all of them imply a sense of urgency or haste when it comes to writing. Whether you're taking notes in class or rushing to finish a project, these synonyms can help you express your ideas quickly and effectively.