Covert prestige
It is generally assumed that non-standard language is low-prestige language. However, in certain groups, such as traditional working-class neighborhoods, standard language may be considered undesirable in many contexts. This is because the working class dialect is generally considered a powerful in-group marker, and especially for non-mobile individuals, the use of non-standard varieties (even exaggeratedly so) expresses neighborhood pride and group and class solidarity. There will thus be a considerable difference in use of non-standard varieties when going to the pub or having a neighborhood barbecue (high), and going to the bank (lower) for the same individual