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The act of having intercourse with a woman during her period, wherein the man (or the person with the dildo) penetrates her vaginally, creating the "rust," and then penetrates her anally, sinking it in a deep dark place.
My cousin had her period, so I totally rusty submarined her.
by bad lady planet October 24, 2010
Its when u fuck a girl in the ass and your dick is coverd in shit and you make the girl give you head.
"hey tyler i gave that girl ashley a rusty submarine last night"
by bak814 September 07, 2006