Definitions from Wiktionary (rock hard)

▸ adjective:  As tough, hard, or inflexible as a piece of rock.
▸ adjective:  (bodybuilding) With muscles developed and toned to a high degree, especially the muscles of the abdomen.
▸ adjective:  (figuratively) Having a very fully erect and stiff penis
▸ adjective:  (figuratively) With strongly held beliefs and opinions, deep conviction.





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