Here is a humorous compilation of expressions set in Essex pronunciation. ESL/EFL students-- the misspellings represent the native pronunciation; see if you can figure out the actual words meant:

A -Z of Essex English:

ASSA COMMONS - Our Parliament Building.
ART ATTACK - Extremely perturbed, as in "Don't tell Sharon, She'll have an
art attack."
ARST - Past tense of ask. "Jordan, I must've arst ya free fazzund times to
clear up yer room."
BANNSA - A person employed to deny access or eject troublemakers at a club.
"Dave's got izself a job as a bannsa."
BANTY - A chocolate and coconut snack bar.
BAVE - To wash oneself.
BOAF - The two. "Oi Dave, ooja fancy most, Sharon or Tracy?" "Boaf" is the
BRANSATCH - Motor racing circuit in Kent.
CANCEL - Administrative body of a town. "Darren, wive ad annuvva letter from
the cancel."
CANTAFIT - Fake, as in money.
CHOONA - An edible fish purchased in a tin and usually prepared with
CORT A PANDA - A big hamburger (smaller than an arf panda)
DAN TO URF - Sensible, practical.
DANNING STREET - Where the Prime Minister lives.
DANSTEZ - On the ground floor , where the biggest telly is.
DREKKUN - Do you consider? as in "Which dog drekkun'll win the next race?"
EFTY - Considerable. "Ere, Trace, this credit card bill's a bit efty."
EJOG - A small, spiky animal.
ERZ - Belonging to her.
EVVY - A big geezer who protects a smaller and more intelligent geezer,
usually for money. "My name's Frank and this is my evvy, Knuckles."
EYEBROW - Cultured, intellectual.
FANTIN - A jet of water for drinking or ornament.
FARVA - A posh way of saying Dad.
FATCHA - Margaret, British Prime Minister 1979 - 1990.
FINGY - A person or object whose name doesn't come to mind. "I ad it off wiv
fingy last night."
FONG - Skimpy undergarment.
FOR CRYIN AT LAAD - Mild expletive showing annoyance or surprise. E.G."For
cryin at lad, Britney, if I say yes will you give it a rest?"
GAWON - Go on. "Gawon Darren, eat ya granny's cabbage, it'll do yer good."
GIVE IT LARGE - To be thorough or enthusiastic.
GRAND - A football stadium. "It all wennoff atside the pub near the grand."
HAITCH - Letter of the alphabet between G and I.
IBEEFA - The Spanish holiday island.
IFFY - Dubious. "Ere, Trace, I fink this bread pudding you made last munf's
a bit iffy."
INT - Indirect suggestion. " I gave Darren a sort of int that it was time to
wash iz feet."
IPS - An unknown area of a woman's body to which chocolate travels. “That
Mars Bar will go straight to me ips."
JA - Do you, did you. "Ja like me new airdo, Sharon."
JACKS - Five Pound note. "Lend us a jacks, wilya?"
JAFTA - Is it really necessary? "Oi mate, jafta keep doing that?"
KAF - Eating house open during the day.
KAFFY - A girl's name.
LAD - Noisy. "Jordan, turn that music dan, it's too lad."
LARJ - Enjoying oneself.
LEVVA - Material made from the skin of an animal.
LOTREE - Costs £1 for a ticket.
MA BLARCH - An arch near Hyde Park.
MAFFS - The study of numbers.
MANOR - Local area.
MINGER - An unattractive person (usually woman).
NARRA - Lacking breadth, with little margin. "Mum wannid to come rand but
changed er mind. That was a narra escape."
NARTAMEAN - Do you know what I mean? (sometimes used as janartamean).
NEEVA - Not one nor the other.
NES - National Elf Service.
OAF - A solemn declaration of truth or committment.
OLLADAY - Time taken away from home for rest and adventure.
ONNIST - Fair and just, without a lie. "I never did it, onnist."
OPPIT - Go away , as in "Oi you, oppit."
PADDA PUFF - Soft, lacking aggression. "They're alright up front but they
got a padda puff defence."
PACIFIC - Specific.
PAFFUL - Having much power or strength.
PAIPA - Sun, Mirror etc.
PANS AN ANNSIS - Imperial weight system.
PLAMMANS - A pub lunch usually made up of cheese and bread.
QUALIDEE - Good, as in "West 'Am's new striker's qualidee."
RAND - A number of drinks purchased for a group.
RANDEER - Locally. "There ain't much call for it randeer."
REBAND - Period of recovery after rejection by a lover. "I couldn't 'elp it.
I was on the reband from Craig."
ROOFLESS - Without compassion.
SAFF - A direction of the compass, opposite north.
SAFFEND - An Essex seaside town.
SAWTED - Done, arranged, resolved.
SEEVIN - Very angry. "I woz seevin when I urd wot 'e sed."
TALENT - Attractive members of the opposite sex. "Dave's gan dan tan to eye
up the talent."
TAN *** - A modern terraced house.
TOP EVVY - A woman of plentiful bosom. "Ere look at that, Darren, she's well
top evvy."
UG - An unattractive person. "Sharon's new geezer's a bit of an ug."
UMP - Upset, as in Got the Ump.
VACHER - A document, which can be exchanged for goods or services. "I got a
vacher to get in cheap at Forp Park."
WANNED UP - Tense. "I'm all wanned up at the moment."
WAWAZUT? - I beg your pardon.
WENNOFF - A fight commenced as in "It all wennoff".
YAFTA - You must : "Even if yer guilty, yafta av mitigating circumstances."
YOOF OSTALL - A place where holidaymakers can stay the night.
ZAGGERATE - To suggest something is better or bigger than is true. "Craig, I
must’ve told ya a fazzund times already." "Don't zaggerate, mum."

Perhaps an Essex member of English Forums can give us an opinion on register, etc.
Not to be a hair-splitter, Mr. M., but shouldn't it befaazzund?
Here's a great site for Bristol pronunciation. Just click on a letter, hope it amuses:

Site Hint: Check out our list of pronunciation videos.
You got me, Abbie-- I'm monolingual.
 rwiles's reply was promoted to an answer.
Students: We have free audio pronunciation exercises.
Perhaps an Essex member of English Forums can give us an opinion on register, etc.
"Formal", I would say.