gashing

/G AE1 SH IH0 NG/
verb
  1. 1

    To make a deep, long cut; to slash.

noun
  1. 1

    The act of making a gash, or cut.

  2. 2

    The roughing operation for worm gears.

Source: https://en.wiktionary.org/wiki/gash, https://en.wiktionary.org/wiki/gashing