Green’s Dictionary of Slang

wazzock n.

a fool.

1976		M. Harding ‘Beaky Knucklewart’ in One Man Show [sound recording] Stood there like a wazzock on the pavement.
1984		M. Harding When Martians Land in Huddersfield 27: [caption] We said ‘Frankincense’ you cloth eared wazzock [OED].
1998		Guardian Sport 25 Sept. 16: I’m sat next to the biggest wassock you’ve ever clapped eyes on.
2006		D. Mitchell Black Swan Green 231: Kick the wazzock’s shins, said the Unborn Twin.
2012		D. O’Donnell Locked Ward (2013) 153: I hate the way christmas starts in August [...] some new wazzock every day is putting up those bloody fairy lights.