of or characteristic of rats
showing signs of wear and tear;
"a ratty old overcoat"
"an old house with dirty windows and tatty curtains"
dirty and infested with rats
We are making teenagers ratty by making them get up early.
If I'm in a ratty mood during the workday, it 's usually because I 've been at my desk writing for too long without moving around.
Her clothes were just plain, no logos, and they were worn, but not ratty or rags.
He was a ratty-looking man with a thin moustache .
He gets ratty if he doesn't get enough sleep.