what does "rusty" mean?

Native speaker’s answer
Rebecca
To be "rusty" means to be unpracticed or out of practice at something, like an activity or skill. You can use this adjective when you want to say that you have not practiced recently, so your skills are not as great as they were. Ex: I'm a little rusty, I haven't played guitar in a long time. Ex: She started off a bit rusty but improved quickly.