Jan 25, 2010. #2. Hello. Actually this expresion is used in lots of contexts, not only in sports. "¡Dale duro!" -don't forget to open and close the sentence with /¡/ and /!/- would mean something like "work this hard!". I don't know if the latter is used in USA, but what I'm trying to tell you is that "dale" (verb dar -to give-, imperative ... More @Wikipedia
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