casualisation

noun

1. (countable, uncountable)The process by which employment shifts from a preponderance of full-time and permanent or contract positions to higher levels of casual positions.
2. (countable, uncountable)The process of making anything casual.

   “While there are some Cockney elements observable in northern English (such as /t/ fronting), other regions of Britain have manifested their own casualisations of RP towards the local vernaculars. So people talk of 'posh Geordie', 'posh Brummy', 'posh Scouse', 'posh Yorkshire Leeds' and so on […]”