tapering jig

[derekleffew]

1. A diminishing dainty dance.

2. An accessory, usually shop-built, for cutting a long angle (taper or Scarf). Most often used with a table saw.

http://www.newwoodworker.com/usetaperjig.html

 

[TEarlywine]

a version of this (without the end-stop) is also quite useful against the fence for cutting angled cuts with a radial arm saw.