A word best described as someone who lives in a council house and tends to wear clothing with large brands on, calls their granny 'nanny' and works as a labourer but buys bottles of grey goose on the weekend. Derived from Fletton in Peterborough where the Fletton Brick is made, the cheapest brick you can buy in the UK market.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"