When you find someone with hair the colour of rust (redhead) extremely attractive.
That Ron Weasley is H-O-T, hot.

Mmm, rust lust.
by superkally June 1, 2011
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The term for the love of ginger folk. There's just something a little bit special about a hair type that may soon be extinct!
person 1: ohhh Prince Harry!!!
person 2: YOU HAVE RUST LUST!!!
by rusterluster June 2, 2011
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The 3 phases of marriage
Lust, Rust, Dust

Lust - when the flame is there
Rust - when the flame hasn't been there for a while
Dust - time for a divorce
by TheDutchDutchess February 19, 2011
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