adj

• (figurative, colloquial) Synonym of incomprehensible, used for foreign speech or text, technical jargon, or advanced subjects.
• (US, not comparable) Of or relating to collegiate fraternities, sororities, or (uncommon) honor societies.
  "“Every single person is going to have a different experience watching this film,” she said when I asked about possibly labeling the Greek system as “toxic”."

noun

• (countable) A person from Greece or of Greek descent.
  "The Greeks believed the sun went round the earth."
• (uncountable) Greek cuisine, traditional or representative Greek food.
• (uncountable, figurative, colloquial) Synonym of gibberish, used for foreign speech or text, technical jargon, or advanced subjects.
  ""I don't hear one word in ten that they say," continued Mrs. Abingdon; "it's Greek to me. However, ...""
• (uncountable, figurative, metonymic, colloquial) Synonym of lorem ipsum, dummy placeholder text used in greeking.

verb

• (obsolete) To cheat at cards.
  "A discovery of Greeking at Brighton, has made considerable noise this month in the sporting world."
• (uncommon) Alternative letter-case form of greek.

verb

• (transitive, computing) To display a placeholder (instead of text), especially to optimize speed in displaying text that would be too small to read.
  "You can specify the type size below which text will be greeked in the Preferences dialog box. Designers often prefer to use greeked text in rough layouts because it helps the client focus on the design rather than on the words."
• (transitive, computing) To fill a template with nonsense text (particularly the Lorem ipsum), so that form can be focused on instead of content.
• (transitive) To obscure a corporate logo that has not been permitted for use in a production.