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For other uses, see Yo (disambiguation).

Yo is an English slang interjection,[1] commonly associated with American English. It was highly popularized after being used commonly in Philadelphia, Pennsylvania since the 1940s.[2]

Although often used as a greeting, yo may come at the end of a sentence, often to direct focus onto a particular individual or group or to gain the attention of another individual or group. It may specify that a certain statement that was previously uttered is more important, or may just be an "attention grabber".

Etymology and history[edit]

The interjection yo was first used in Middle English.[3] In addition to yo, it was also sometimes written io.[4] The Middle English term originated from Old English ġēa ("yea, yes"), which is derived from Proto-Germanic *ja ("thus, so, yes").[5][6][7][8][9]

Though the term has always had some use in the English speaking world since the 15th and 16th centuries, its current popularity seems to have largely grown out of its use in Pennsylvania, particularly by Philadelphia's Italian immigrant population. During the mid-1940s, Philadelphia's adjacent Italian and African-American neighborhoods experienced significant growth, resulting in the merging of the two cultures.

From the late twentieth century it frequently appeared in hip hop music and became associated with African American Vernacular English, as seen in the title Yo! MTV Raps, a popular American television hip-hop music program in the 1990s.

Notable uses[edit]

A famous example of a fictional Philadelphian bringing notice to the expression is Rocky Balboa, where the word is used throughout all of the Rocky films, and is part of the iconic line, "Yo, Adrian, I did it!", which was ranked 80th in the AFI's list of 100 best movie quotes.

The phrase "Yo, Blair. What are you doing?" was an informal[10] greeting that United States President George W. Bush gave to British Prime Minister Tony Blair during the summit of the "G8" (Group of Eight industrialized nations) in Saint Petersburg, Russia, on 17 July 2006. The quote gained wide popularity across the media, and many began to use the phrase in a casual manner, interjecting it at certain points in sentences, as it was popularized.

The term is now widely used amongst all ethnicities in the Philadelphia metro.

Other uses[edit]

In Baltimore, and possibly other cities, yo (or a word coincidentally identical to it) has become a gender-neutral pronoun.[11]


  1. ^ "Yo - Define Yo at Dictionary.com". Dictionary.com. Retrieved 7 November 2014. 
  2. ^ Dalzell, Tom (1996). Flappers 2 Rappers: American Youth Slang. Springfield, Massachusetts: Merriam Webster. ISBN 0-87779-612-2. 
  3. ^ "yo: definition of yo in Oxford dictionary (British & World English)". Retrieved 7 November 2014. 
  4. ^ Yo, Merriam-Webster's Collegiate Dictionary
  5. ^ "Online Etymology Dictionary". Retrieved 18 November 2014. 
  6. ^ Brooke, Maxey. "Yes, Indeed" (PDF). Retrieved 18 November 2014. 
  7. ^ "Online Etymology Dictionary". Retrieved 18 November 2014. 
  8. ^ Words in Dictionaries and History: Essays in Honour of R.W. McConchie Page 157
  9. ^ "Punch, or the London Charivari, Volume 98, May 24, 1890 by Various". gutenberg.org. Retrieved 18 November 2014.  (search for the line "yeo-ho")
  10. ^ Susie Dent (2007) The Language Report: English on the move 2000–2007
  11. ^ "Language Log". Retrieved 7 November 2014.