adj. Having your muscles large, hard, and tight from too much exercising; having muscles so developed that you can hardly move. Bob was big and strong, but he was muscle-bound, and Bill could beat him. An athlete must train properly so as not to become muscle-hound.
MUSCLE-BOUND
Meaning of MUSCLE-BOUND in English
American idioms English vocabulary. Английский словарь американских идиом. 2012