1. worn out, shabby, or in poor condition
Usage: informal
2. bad-tempered or irritable
Usage: informal
3. resembling or infested with rats

Examples

• His ratty old sweater had holes in both elbows.
• The ratty couch in the basement needed to be replaced.
• She gets ratty when she hasn’t had enough sleep.
• Don’t be so ratty with your little brother.
• The abandoned warehouse had a ratty smell.
• Her ratty hair hung in greasy strands.
• The ratty apartment was infested with rodents.