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Vigorous and virile. Typically applied to a man, the phrase can suggest a strong sexual appetite. He likes the same things as any other red-blooded American man—fast cars, juicy steaks, and beautiful women.
Passionate and impetuous; having or characterized by intense or excessive desire or emotion. He's way too cold and distant for me. I want a warm-blooded man who's as passionate about life as I am! I'm trying to be calmer, more deliberative, because I tend to be a bit too warm-blooded when I make decisions.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.