nahtameen
A sneaky way of saying 'na meen' that East Londoners use to make you feel like a donkey. It's like when you're being a bit of a twat and you don't even know it.
'He said he'd beat me in a race. Nahtameen!'
'She kept talking about her dog like it was the king of the world. Nahtameen!'
'He said he'd win the competition. Nahtameen!'