Slang is language (words, phrases, and usages) of an informal register that members of particular in-groups favor (over the common vocabulary of a standard language) in order to establish group identity, exclude outsiders, or both.

Etymology of the word slang

In its earliest attested use (1756), the word slang referred to the vocabulary of "low" or "disreputable" people. By the early nineteenth century, it was no longer exclusively associated with disreputable people, but continued to be applied to usages below the level of standard educated speech.[1] The origin of the word is uncertain, although it appears to be connected with thieves' cant. A Scandinavian origin has been proposed (compare, for example, Norwegian slengenavn, which means "nickname"), but based on "date and early associations" is discounted by the Oxford English Dictionary.[1] Jonathan Green,[who?] however, agrees with the possibility of a Scandinavian origin, suggesting the same root as that of sling, which means "to throw", and noting that slang is thrown language – a quick, honest way to make your point.[2][3]

Other Languages
العربية: لغة دارجة
asturianu: Slang
azərbaycanca: Slenq
Bân-lâm-gú: Sio̍k-jîn-ōe
беларуская: Слэнг
Boarisch: Slang
català: Slang
čeština: Slang
dansk: Slang
eesti: Släng
Ελληνικά: Αργκό
español: Slang
Esperanto: Slango
한국어: 속어
հայերեն: Սլենգ
हिन्दी: कठबोली
Ido: Slango
Bahasa Indonesia: Slang
íslenska: Slangur
italiano: Slang
עברית: סלנג
ქართული: სლენგი
қазақша: Слэнг
lietuvių: Slengas
magyar: Szleng
македонски: Сленг
Bahasa Melayu: Slanga
မြန်မာဘာသာ: ဗန်းစကား
Nederlands: Slang (taal)
日本語: 俗語
norsk: Slang
norsk nynorsk: Slang
polski: Slang
português: Gíria
русский: Сленг
Scots: Slang
Simple English: Slang
slovenčina: Slang
slovenščina: Sleng
Soomaaliga: Af-suuq
српски / srpski: Сленг
suomi: Slangi
svenska: Slanguttryck
Tagalog: Balbal
தமிழ்: குறுமொழி
ไทย: สแลง
Türkçe: Argo
українська: Сленг
اردو: کٹھ بولی
Tiếng Việt: Tiếng lóng
中文: 俚語