line noise

Noun

 * 1)  Spurious characters due to signal noise in a communications link.
 * 2)  Data that looks random, as when outputting a binary file as text.
 * 3)  Incomprehensible source code or other textual material (often due to terseness or overuse of operators).
 * 4) * 2000, Simon Cozens, Ten Perl Myths, perl.com,
 * In short, Perl doesn't write illegible Perl, people do. If you can stop yourself being one of them, we can agree that Perl's reputation for looking like line noise is no more than a myth.