Probably from Greek ("unintelligible speech or text").

• IPA: /ɡɹiːk/

greek (plural greeks)

1. Alternative case form of Greek.
2. Alternative case form of Greek.

greek (greeks, present participle greeking; simple past and past participle greeked)

1. (transitive, computing) To display a placeholder (instead of text), especially to optimize speed in displaying text that would be too small to read.
2. (transitive, computing) To fill a template with nonsense text (particularly the Lorem ipsum), so that form can be focused on instead of content.
3. (transitive) To obscure a corporate logo that has not been permitted for use in a production.

• it's all Greek to me

From Old English Grēcas, variant of Crēcas, from Proto-West Germanic *Krēkō, from Latin Graecus of uncertain origin, perhaps derived from the toponym Γραῖα or from other Paleo-Balkanic forms from a tribal name Graii.

• enPR: grēk, IPA: /ɡɹiːk/

greek (comparative greeker, superlative greekest)

1. Of or relating to Greece, its people, its language, or its culture
   • 1879, R[ichard] J[efferies], chapter II, in The Amateur Poacher, London: Smith, Elder, & Co., […], →OCLC ↗:

     Ikey the blacksmith had forged us a spearhead after a sketch from a picture of a Greek warrior; and a rake-handle served as a shaft.

2. (figurative, colloquial) Synonym of incomprehensible, used for foreign speech or text, technical jargon, or advanced subjects.
3. (US, not comparable) Of or relating to collegiate fraternities, sororities, and/or (uncommon) honor societies.

• (senses relating to Greece, Greeks, and Greek) See Thesaurus:Greek

• French: grec
• German: griechisch
• Italian: greco
• Portuguese: grego
• Russian: гре́ческий
• Spanish: griego

1. The language spoken by people of Greece, particularly, depending on context, Ancient Greek or Modern Greek.
2. The written form of these languages.
3. Surname.

• Griko

• French: grec
• German: Griechisch, griechische Sprache
• Italian: greco
• Portuguese: grego
• Russian: гре́ческий
• Spanish: griego

greek

1. (countable) A person from Greece or of Greek descent.
2. (uncountable) Greek cuisine, traditional or representative Greek food.
3. (uncountable, figurative, colloquial) Synonym of gibberish, used for foreign speech or text, technical jargon, or advanced subjects.
4. (uncountable, figurative, colloquial) Synonym of lorem ipsum, dummy placeholder text used in greeking.
5. (countable, US, colloquial) A member of a collegiate fraternity or sorority.

   Was Joe a Greek in college?

6. (countable, archaic, slang) A cunning rogue.
   • 1822, A Morning in Cork-Street: or, Raising the wind, page 102:

     The wind-up is, that the father becomes bankrupt; the wife and daughters town-traders; the sons Greeks, Fancy-swells, Conveyancers (pickpockets), or Cracksmen (house breakers), and the New Drop is the last drop they ever take.

7. (countable, archaic, slang) A merry fellow.
8. (uncountable, slang) Anal sex.
   • 2001, "ASP: 'Julie' of Oral-Land-Oh", alt.sex.prostitution, Usenet:

     She is absolutely a total GFE, no limits, except no Greek. (Well...I say “no Greek” - - if she is really hot for you, and if she is really turned on in a long session, she might beg for a finger in her anus while you suck her clit, but she is just too tiny and tight for any “real meat” in the backdoor.)

9. (finance, mostly in the plural) One of the Greeks, measures of derivative price sensitivity.

• (person from Greece or a descendant) See Thesaurus:Greek
• (anal sex) See Thesaurus:anal sex

• Griko

• French: grec, grecque, grecques
• German: Grieche, Griechin
• Italian: greco, greca
• Portuguese: grego
• Russian: грек
• Spanish: griego, griega

greek (greeks, present participle greeking; simple past and past participle greeked)

1. (obsolete) To cheat at cards.
2. (uncommon) Alternative case form of greek.