English

Noun

fat arrow ‎(plural fat arrows)

1. (computing) The => symbol, which has specific meanings in various programming languages.
   • 2013, Mark E. Daggett, Expert JavaScript, ISBN 9781430260981, p. 39 (Google preview):

     The fat arrow is a new shorter way to write functions using '=>' instead of 'function() {}', and will look familiar to anyone who has used CoffeeScript.

   • 2013, Peter Scott, Perl Medic: Transforming Legacy Code, ISBN 9780133599954, p. 78 (Google preview):

     A constant can't be used on the left-hand side of a fat arrow (=>) because that turns it into a string.