proglet

proglet /prog'let/ n.  [UK] A short extempore program
   written to meet an immediate, transient need.  Often written in
   BASIC, rarely more than a dozen lines long, and containing no
   subroutines.  The largest amount of code that can be written off
   the top of one's head, that does not need any editing, and that
   runs correctly the first time (this amount varies significantly
   according to one's skill and the language one is using).  Compare
   {toy program}, {noddy}, {one-liner wars}.