You're a gent, said the other, straightening his shoulders again. He appeared not to have noticed Winston's blue overalls. Pint! he added aggressively to the barman. Pint of wallop..
1971: Uniformed cops are generally known as 'wallopers', and cops in plain clothes are called 'demons'. These latter, supposed to be disguised, are instantly recognisable. — John O'Grady, Dealing with Cops, from Aussie Etiket, 1971. Quoted in Aussie Humour, Macmillan, 1988, ISBN 0-7251-0553-4, page 200.
For forgetting to pick up the package again, my boss gave a walloping.