Definition of "greek"

noun:
- Nonsense writing or talk; gibberish.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
verb:
- To display a placeholder instead of text, especially to optimize speed in displaying text that would be too small to read.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- To fill a template with nonsense text (particularly the Lorem ipsum), so that form can be focused on instead of content.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License