To do particularly hard work or put forth a large amount of effort (toward some task), especially in sports. You're never going to have a successful business if you aren't willing to do the hard yards yourself. Our team did the hard yards all game long, and we managed to pull out a victory in the end because of it.

Particularly hard work or a large amount of effort (toward some task), especially in sports. Often used with the verbs "do," "make," or "put in." You're never going to have a successful business if you aren't willing to put in the hard yards yourself. Our team did the hard yards all game long, and we managed to pull out a victory in the end because of it.