The current speaking style favoured by London's urban yoof is heavily accented as well as typified by slang expressions. Hackney being an area of East London (in which I reside) which has the dubious honour of being the worst borough in Britain repeatedly. Please note that the slang described here is common throughout britian, and is an accent developed often by well spoken people to attain street cred.
The general Hackney Patois comes from a mash up of east london cockney, afro- carribbean, general chavspeak and Hip-Hop slang often attributed to British Asian yoof as popularised by Ali G.

The vocabulary is inextricably linked to cellular phone sms (text) messaging, and online instant messaging, where limited space and speed of texting required abbreviations (m8 - mate, l8r - later, etc.) So much that often the true spelling of words are forgotten. Predictive text messaging has reversed some language - e.g 'book' was used for 'cool' as that was easier to text is now being used in language.
The 'grime' music scene sees Hackney Patois at its core - see artists such as M.I.A and Lady Soverign
as overheard in Hackney patois....
"Put dat down - you iz not gonna get nuffin' "
"She luk at me like dat agen she gonna get sum licks, yea' "
" I dahn't wannit, its got peas in it, innit! "
" ya get me, bruv? "
by GishGish November 22, 2007
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Spoken in both London and Toronto mainly, this dialect takes words and phrases from Jamaican patois and mixes it with english/canadian words and phrases. These two regions share similar slang but are so far away from each other due to high amounts of Jamaican immigration throughout the years.
Wagwan’ is an example of a jamaican phrase which is popularly used in both toronto and london. A londoner may pair this greeting with ‘bruv’ and a canadian may pair it with ‘dude’. This is Pseudo-Patois
by Just_a_simp May 19, 2019
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Jamaican Patwa {or Patois) is a so-called creole language. A "creole" is a language that has been influenced by others. In the case of Jamaican patois, the influences have come from French, Spanish, Arawak, Twi and many others.

Up until today, speaking creole has been widely regarded as "inferior", which is why Jamaican Patois has no convention for spelling and grammar. Thus you can spell it anyway you want it. For instance "brother" can be spelled "bradda", "breda" or "bretha", which only adds to the confusion. Modern dub poets like Linton Kwesi Johnson have taken it as far as spelling nearly every single word alternatively, even when the pronunciation is the same. E.g.: "one another" he spells "wananada".

There are many other varieties of patois, like Haitian patois, Santa Lucia patois, Louisiana patois etc.
Example of Shakira's Un Poco de Amor
lyrics Jamaican Patois verses:

Roots and creation com'again! / So mi guardian, mi guardian mi liff up di plana / Now everybody ago do dis one / Like in down di Caribbean / San Andrés, Providence Island / Liffit up, Mekit nuff affliction / Say goodbye to di worse segregation / Dis a di cage of di new generation / Liffit up to di high revelation
by Dino March 13, 2005
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A dialect, or patois, used mainly by college frat boys. Th word fuck must be used in every sentence, often more than once.
Fuck John! That fucking mother fucker fucked my fucking girlfriend!
by meeeeeeeeeeeeeeeeeeee June 27, 2005
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