They are disheveled.
anoying
slob
slob
The word "slovenly" comes from the Middle English word "sloven," meaning a person who is careless or untidy in their appearance or habits. It has roots in Old Frisian and Dutch languages, where it originally meant a person of a lower class or someone who works in a nonchalant or messy manner.
slob
slob
First, "tidy" is an older word for "neat." SO, the antonym (the opposite) would be: untidy, messy, sloppy, and slovenly.
The word "slovenly" is an adjective.
his was slovenly dressed
The untidy man dressed in a slovenly manner.
slovenly
slovenly