JAPH is a short piece of Perl code that produces th Output:
Just Another Perl Hacker
Not more than four lines of code. And no more than 80 characters in each line.
The original JAPH (me) created original JAPHs that were one line of code (mostly) to produce Just another Perl hacker, with precisely those 25 characters of output. Any other definition would be merely a quasi-JAPH. Beware the false japh!