What is the adverb of sloppy?

There isn't a single, perfect adverb form for "sloppy." However, depending on the context, you could use these options:

* Sloppily: This is the most direct adverb form, meaning "in a sloppy manner."

* Carelessly: This suggests a lack of attention to detail.

* Messily: This emphasizes the untidiness of the action.

* Haphazardly: This implies a lack of planning or order.

The best choice will depend on the specific meaning you want to convey.