fricativization (consonant weakening)

/p/, /t/, /k/, /b/, /d/, /g/ become fricatives:/ɸ/, /ʂ/, /x/, /β/, /ʐ/, /ɣ/


worker wɜrxər

because, bɪkəz, pxəz
look there, 'lʊkðɛər, 'lʊxðɛər
some time ago, sʌm'taɪməgəʊ, sʌm'taɪməɣʊ

More, listening to spoken english, Gillian Brown, p.74
Bailey talks abt this in his EPT