[horse] Hard Tack (1926–1947) was an American Thoroughbred racehorse owned and bred by the Wheatley Stable of Gladys Mills Phipps and her brother Ogden L. Mills. Sired by Man o` War, he showed considerable promise as a racer, but his temper prevented him from achieving success on the track. As an example, on one occasion when the starting...
Found on
http://en.wikipedia.org/wiki/Hard_Tack_(horse)

• (n.) A name given by soldiers and sailors to a kind of hard biscuit or sea bread.
Found on
http://thinkexist.com/dictionary/meaning/hard-tack/
Hard'-tack` (-tăk`)
noun A name given by soldiers and sailors to a kind of hard biscuit or sea bread.
Found on
http://www.encyclo.co.uk/webster/H/14
No exact match found.