Friend of a friend

For the Foo Fighters song, see Friend of a Friend (song).

Look up FOAF in Wiktionary, the free dictionary.

Friend of a friend (FOAF) is a phrase used to refer to someone that one does not know well, literally, a friend of a friend.

In some social sciences, the phrase is used as a half-joking shorthand for the fact that much of the information on which people act comes from distant sources (as in "It happened to a friend of a friend of mine") and cannot be confirmed.^[1] It is probably best known from urban legend studies, where it was popularized by Jan Harold Brunvand.^[2]

The acronym FOAF was coined by Rodney Dale and used in his 1978 book The Tumour in the Whale: A Collection of Modern Myths.^[3]

The rise of social network services has led to increased use of this term. Six degrees of separation is a related theory.

Other languages

"Dúirt bean liom go ndúirt bean léi" (Irish proverb) — similar Irish language term literally meaning a woman told me that a woman told her that…
"L'homme qui a vu l'homme qui a vu l'ours" (French proverb) — similar French language proverb literally meaning The man who saw the man who saw the bear, in which the bear is never seen, only heard of.^[4]^[5]
"Un amigo me dijo que un amigo le dijo…" (Spanish proverb) — meaning literally A friend told me that a friend told him that…
"Jedna paní povídala…" (Czech proverb)— similar Czech language proverb literally meaning One lady said…
"Teman kepada teman saya..." Bahasa Indonesia; literally meaning friend of my friend.
"Babaturana babaturan urang..." Basa Sunda; literally meaning friend of my friend. There is another version of this phrase in Sundanese language, "Babaturan dulur urang", which means "friend of my relatives".
"카더라..." Korean; Gyeongsang dialect word literally meaning Who said that…
"Diz-se que..." or "Dizem que..." Portuguese; literally meaning It is said that… or They say that…
"Freundesfreund" German; literally meaning a friend's friend

References

↑ Goodreau SM, Kitts JA, Morris M (2009). "Birds of a feather, or friend of a friend? Using exponential random graph models to investigate adolescent social networks". Demography 46 (1): 103–25. PMC 2831261. PMID 19348111.
↑ Inropsych.com "Friend of a Friend"
↑ Brunvand, Jan Harold (2012). Encyclopedia of Urban Legends, Updated and Expanded Edition. ABC-CLIO. p. 241.
↑ Rotten Tomatoes for 2013 firm "L'homme qui a vu l'homme qui a vu l'ours"
↑ NY Times note on French film with name

Social networks and social media

Types	City Personal Professional Sexual Value

Networks	Distributed social network (list) Enterprise social networking Mobile social network Personal knowledge networking

Services	List of social networking websites List of virtual communities with more than 1 million users List of virtual communities with more than 100 million active users

Concepts and theories	Assortative mixing Interpersonal bridge Organizational network analysis Small-world experiment Social aspects of television Social capital Social data revolution Social exchange theory Social identity theory Social network analysis Social web Structural endogamy

Models and processes	Aggregation Change detection Collaboration graph Collaborative consumption Giant Global Graph Lateral communication Social graph Social network analysis software Social networking potential Social television Structural cohesion

Economics	Collaborative finance Social commerce

Phenomena	Community recognition Complex contagion Consequential strangers Friend of a friend Friendship paradox Six degrees of separation Social invisibility Social network game Social occultation Tribe

Related topics	Researchers User profile Viral messages Virtual community

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