So ive been seeing this title or phrase on a lot of animators' animations. Wat does unrust/unrusting mean?

Unrusting refers to the act of ending a long period of inactivity, in which you're getting back into the animation shtick.

Rust refers to the declining skill from inactivity, since the longer you're not doing something, the more unskilled or 'rusty' you are at something.

Unrusting refers to the act of making short "tests" in order to get circlejerked after you realize that you haven't been animating in the public eye for awhile and all your long-term projects are failing to laziness.

Okay thanks guys very appreciated