1. Dirty, grimy, or in poor condition; unpleasant or unclean.
Usage: informal; chiefly British
2. Unwell, sick, or in poor health.
Usage: informal; chiefly British

Examples

• The old carpet was manky and needed to be replaced.
• I felt manky this morning, so I stayed home from work.
• Don't touch that manky old couch—it's covered in dust.
• The bathroom was absolutely manky before we cleaned it.
• He looked manky after working in the garden all day.
• That manky shirt should have been thrown out years ago.