Standard English: What's a wazzock?

Donald Trump was branded a racist demagogue, a buffoon and a “wazzock” in the British parliament as MPs debated whether to ban the Republican presidential candidate from coming to the UK. -- Guardian

I had to look up the term in the Urban Dictionary. Here's what came up:

idiot pillock twat moron daft dipstick gordonite muppet slaphead spack head twit wassock wazz wazzer widget harding offensive in actions and words wanker wassuck wazzuck

Got it.