I found a list of Japanese idioms (without translations) that I wanted to study, so I sat down and looked up the meanings. Most of them I found in my trusty denshi jishyo, and a couple of them I had to resort to some internet resources (goo, Google Translate etc.), but I couldn't find the meaning of
体が余る anywhere. (Full disclosure: I found a couple of typos on the list, this one was listed as
体に余る, but Google points at it using
A direct translation would be something like "A surplus of body"...perhaps it means overweight?