Acme

Acme n.  The canonical supplier of bizarre, elaborate and
   non-functional gadgetry -- where Rube Goldberg and Heath Robinson
   shop.  Describing some X as an "Acme X" either means "This is
   {insanely great}", or, more likely, "This looks {insanely
   great} on paper, but in practice it's really easy to shoot yourself
   in the foot with it."  Compare {pistol}.

   This term, specially cherished by American hackers and explained
   here for the benefit of our overseas brethren, comes from the
   Warner Brothers' series of "Roadrunner" cartoons.  In these
   cartoons, the famished Wyl E. Coyote was forever attempting to
   catch up with, trap, and eat the Roadrunner.  His attempts usually
   involved one or more high-technology Rube Goldberg devices --
   rocket jetpacks, catapults, magnetic traps, high-powered
   slingshots, etc.  These were usually delivered in large cardboard
   boxes, labeled prominently with the Acme name.  These devices
   invariably malfunctioned in violent and improbable ways.