1. most untidy or careless in appearance or habits
Usage: informal; somewhat dated

Examples

• Her room was the sluttiest of all her siblings’ rooms.
• The sluttiest corner of the garage was where old paint cans were stored.
• He kept his tools in the sluttiest manner possible.
• The sluttiest part of the garden needed immediate attention.
• She admitted her desk was the sluttiest workspace in the office.