Hair. As in Barnet Fair

An English town just off the north edge of London, at the top of the northern line.
A boring place, overrun by the common urban chav and aggressive people who wear henleys.
Other places such as Harrow or Wembley or Harlesden are much, much worse than Barnet, as they are full to the brim with badmans, rudeboys and dole scum.

a cockney phrase for a new haircut.

big bushy hair like a pillow on the back of your head .you have to shoat "oweeeeeeeeeeeeeeeeee"and look like the michalin man .also have bugeies and then have a hair cut like a monk or friar tuck.