Similar to the more widely renound sexual practice of Dogging, Nanning is cropping up heavily around the industrial estates of North East London. Men flood to predefined meeting points in their vehicles, with their Nan's riding shotgun. The Nan's are then paraded amid the circle of parked cars, before being traded amongst the other men or 'Nanners'. The swapped Nan's are then sexually gratified on the car bonnets.

used to insult the persons nanny or to say it randomly is to not care m8

The common British offense used by younger males to offend others.

1. An insult used in Coventry (A Place in England)and possibly across the UK but i cannot be sure.. because i got tired of doing "your mum"

That women you just finger all the time and when you get bored smash her over the head with a coffee table

An English insult used similarly to the phrase "your mom"