Nig-nog, as the comment about racists indicates, does refer to people not fitting the title of Procul Harum's main hit...
Related to the take you home lost is one I overheard in our local Woolworths. Liverpool mum slapping small kid (wailing its head off), 'We've brought you here to enjoy yourself, and enjoy yourself you bloody well will!' Various versions have been recorded elsewhere, including 'You get yerself killt on the road an' I'll bloody murder you!' but I actually heard this one.
In a Liverpool shop, mum to kid who wanted energy drink, 'Yer NOT having one! 's all full of sugar. Yerse'll be bouncin' off the bloody walls!'