rust out
Advanced (C1)neutral
When something is ruined by rust from the inside, or when a person gets worse from not doing anything
"The old truck had completely rusted out — the floor panels had crumbled away."
Hear it in context

We Finished the FA24 swap on the BRZ… and Drove It!
Gears and Gasoline · 12:52
going to rust out like those did because

We Finished the FA24 swap on the BRZ… and Drove It!
Gears and Gasoline · 12:31
um sometimes hard to clear all that rust out.

This Engine Hasn't Run For 50 Years.
Garbage Time · 35:53
all of it's just moving rust out the way.

We Finished the FA24 swap on the BRZ… and Drove It!
Gears and Gasoline · 13:08
of a millimeter of uh exposed metal to rust out.

The unforeseen consequences of a fast-paced world | Kathryn Bouskill
TED · 1:58
They say they'd rather burn out than rust out.