rust off(redirected from rusts off)
1. To erode and fall off or disintegrate as a result of rust. The iron gate is so old that the latch holding it shut has completely rusted off.
2. To cause something to become eroded by rust and fall off or disintegrate as a result. The briny sea air had rusted the metal siding right off.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.