rusty

Short definition from Wiktionary

Adjective

1. 1
   Marked or corroded by rust.
2. 2
   Of the rust color, reddish or reddish-brown.
3. 3
   Lacking recent experience, out of practice, especially with respect to a skill or activity.
4. 4
   Of clothing, especially dark clothing: worn, shabby.
5. 5
   Affected with the fungal plant disease called rust.
6. 6
   Discolored and rancid; reasty.

Noun

1. 1
   A gun or in particular an old or worn one.

Proper noun

1. 1
   A male given name.