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Somebody who has strong ideals and strong ways of stating those ideals.

Somebody who says what they mean, and means what they say.
"That guy's got a spine, if Spiderman exists."

"She's got quite a spine there."

"Bob has quite the spine to make such a dirty comment"
by katiek August 28, 2006
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2
An extremely attractive part of the human body. An important trait looked for in a mate.
"Woah, did you see Justin? Damn he's fine. Look at that spine..."
by iLIKEspinez February 26, 2009
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