Green’s Dictionary of Slang

pot-walloper n.

[a pun on SE pot-walloper, lit. ‘the boiler of a pot’. ‘The term applied in some English boroughs, before the Reform Act of 1832, to a man qualified for a parliamentary vote as a householder (i.e. tenant of a house or distinct part of one) as distinguished from one who was merely a member or inmate of a householder’s family; the test of which was his having a separate fire-place, on which his own pot was boiled or food cooked for himself and his family’ (OED)]

1. a scullion, a kitchen servant.

[US]Bartlett Dict. Americanisms (2nd edn) 335: Pot-Walloper. A scullion .
[UK]Sl. Dict.
[UK]G.A. Sala in Living London (1883) Aug. 331: I want a lexicon which shall tell me about [...] ‘pot-wallopers’.
[NZ]N.Z. Observer 27 May 169/4: The Makarau Christian has been promoted from off-side bullock-puncher to head pot-wholloper in C.Y.’s culinary establishment.
[Aus]C. Crowe Aus. Sl. Dict. 60: Pot Walloper, one who looks after the cooking of his meals.
[US]S.F. Call 30 Dec. 1/2: His compliments to [the] cook of the hotel Victoria, and she is ‘a goggle-eyed pot-walloper’.
[Aus]Bulletin (Sydney) 26 Jul. 13/2: Part of the moral is that every girl, if she has to go into the domestic circle, should go there as Bridget Murphy, pot-walloper, with plenty of sass for the missus, instead of as a poor, trembling Miss Smith, lady-help.
[US]J. London Valley of the Moon (1914) 387: Is he not the Cave-Bear Pot-Walloper and Gridironer, the most fearsome, and, next to me, the most exalted of all the Abalone Eaters? [DA].
[Aus]Sport (Adelaide) 29 May 3/3: They Say [...] That The ‘Times’ [...] has cast the nurse down [...] and on with the pot walloper now.
[Aus]Sun. Times (Perth) 24 Dec. 2s/3: The peanut who was pot-walloping for the Con.-Ponins.
[UK]P. MacGill Moleskin Joe 135: Some pot-walloper from Glasgow out o’ a job.
[UK]Taunton Courier 12 Mar. 4/2: In Ireland and the North of England a ‘pot-walloper’ or ‘pot-walliner’ is a derogatory name for an under-servant in the kitchen.
[US]W. Pegler George Spelvin Chats 44: George Spelvin, American and his ever-loving have been having the devil’s own time with old Hattie the potwalloper who has been working around their bower these last fifteen years.
[Ire]P. Kavanagh Tarry Flynn (1965) 227: ‘The dirty pot-walloper,’ she was referring to Molly now.
[Aus]T.A.G. Hungerford Riverslake 99: She did not intend that the girl should marry a pot-walloper from a labourer’s camp.
[US]‘Weldon Hill’ Onionhead (1958) 99: ‘Wollager’s pot-walloper school!’.
[UK]L. Dunne Goodbye to The Hill (1966) 75: Doogan was [...] sitting drinking orange with a mot who was a pot-walloper if ever I saw one.
[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 39: Pot Walloper Kitchenman.
[US]H. Roth From Bondage 265: But he got a job, pot walloper.

2. (US) a slovenly person.

[UK]J. Mair Hbk of Phrases 112: Potwalloper, a slovenly person.

3. a heavy drinker.

[Scot]Dundee Courier 30 Aug. 2/7: The Highland brother pursued so far the plan of the more southern pot-walloper. He entered a public house, asked for, got, and duly drank his glass of whisky.
[US]G. Milburn ‘A Pretty Cute Little Stunt’ in Brookhouser These Were Our Years (1959) 158: You old potwalloper, you!