Definition of "porker"

Jerry Lynch, a pig's head pickled. Term usually applied to the long Irish heads which are sent over here for sale in the poorer districts of London, and which are vastly different from the heads of “dairy-fed” porkers.

1873, John Camden Hotten, The Slang Dictionary

Again, when Harold was locked up in his room all day, for assault and battery upon a neighbour's pig, - an action he would have scorned, being indeed on the friendliest terms with the porker in question, - there was no handsome expression of regret on the discovery of the real culprit.

1895, Kenneth Grahame, The Golden Age, London, page 6

All the other male pigs on the farm were porkers.

1943 November – 1944 February (date written; published 1945 August 17), George Orwell [pseudonym; Eric Arthur Blair], Animal Farm […], London: Secker & Warburg, published May 1962