metric buttload (n.),

  1. 2.4710439 English buttlodes.
  2. the capacity of the platinum-iridium International Standard butt, which is housed in Sevres, France, along with the platinum-iridium kilogram and the old bar with the scratches that used to be the standard meter.

 

This definition used to be at http://home.earthlink.net/~terrafied/work/mbload.html, but has since gone off the air, tits up, defunct, as it were. I thought it was too important to fade away!

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