Rust monsters Synonyms

Rust replaced

(noun) a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture
(noun) the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
(verb) become destroyed by water , air, or a corrosive such as an acid

RM is an abbreviation for Rust Monsters

What does RM stand for?

RM stands for "Rust Monsters"