Green’s Dictionary of Slang

(W.I.) bones that are weighed up by the butcher and charged for along with the meat that accompanies them.

1893

C. Sullivan Jam. Cookery Bk 22: The butchers charge [...] for bone as well as meat, and sometimes one is disappointed to find that when ‘meat’ is delivered, one half of it is ‘weigh-meat’ or large pieces of bone [DJE].