Strong and negative:
* Scrawl: This implies hurried, messy writing.
* Scribble: This suggests a lack of precision and control.
* Dabble: This implies a light and casual approach to writing, often with little thought.
* Slash: This is more aggressive and suggests a lack of care for the writing surface.
* Fling: This suggests a reckless and hurried approach, as if throwing words onto the page.
* Hack: This suggests a rough, unpolished style of writing.
* Daub: This implies a clumsy and haphazard application of words.
More neutral:
* Sketch: This can suggest quick, rough notes or outlines, which may be careless by design.
* Jot: This implies brief and hasty writing, possibly for a quick reminder.
The best verb to use will depend on the specific context and the effect you want to achieve.