What is another word meaning sloppy writing?

Here are some words that could describe sloppy writing, depending on the specific aspect you want to emphasize:

General sloppiness:

* Untidy

* Messy

* Disorganized

* Careless

* Haphazard

* Rambling

* Unpolished

* Rough

Focusing on grammar and mechanics:

* Grammatically incorrect

* Full of errors

* Incoherent

* Poorly formatted

* Unedited

Focusing on style and clarity:

* Vague

* Ambiguous

* Confused

* Unclear

* Ineffective

* Awkward

Focusing on the writer's attitude:

* Lazy

* Disrespectful

* Inattentive

* Unprofessional

The best word will depend on the specific context and what you want to convey.