mook

to put it in one word - a bastard.
or prick. or sum guy that shows off all the time about stuff.

Dizzee rascal vs Crazy Titch -
they had an mc battle n then Crazy T calls diz a mook.

diz - 'I'm not a mook, i kno wot ur thinkin ye, but I'm not a mook!'

and then it breaks into a fight.
After Crazy Titch releases the piss-take song - Jus' an arsehole in the tune of Jus' a rascal.Then diz did a freestyle to leanback to take the piss or Crazy T.