Suggests someone's appearance might stem from not having much money. His shoes were shabbily worn, hinting at his humble means.
Pro Tip 2/3
Neglect Indication
Implies that something has not received proper attention or maintenance. The garden was left shabbily unattended after the family moved.
Pro Tip 3/3
Casual or Informal
Often associated with a casual or informal context, not suited for formal settings. He arrived at the job interview shabbily dressed and was turned away.