Certain areas of the West Midlands are stereotyped as having stronger accents than others, Dudley in the Black Country being an example. There are some local phrases in the Black Country that are renowned. People do tend to substitute a reply of "arr" for "yes". Generally, most words are shortened, most commonly being "I haven't" to "I ay" (which can be argued as an even shorter form of "I ain't").
In the south of the West Midlands (southern Warwickshire and Worcestershire), the accent is more similar to the general southern accent.
Clark, Urszula (2004), "The English West Midlands: phonology", in Schneider, Edgar W.; Burridge, Kate; Kortmann, Bernd; Mesthrie, Rajend; Upton, Clive (eds.), A handbook of varieties of English, 1: Phonology, Mouton de Gruyter, pp. 134–162, ISBN3-11-017532-0
BL staff. "Sounds Familiar?". British Library. Retrieved 19 February 2012. – Listen to examples of regional accents and dialects from across the UK on the British Library's 'Sounds Familiar' website