Green’s Dictionary of Slang

1. (Scot.) an Englishman.

1726		E. Burt Letters from Scotland I (1754) 137: ’Tis from this notion of the people, that my Countrymen, not only here, but all over Scotland, are dignified with the title of Poke Pudding, which [...] signifies a Glutton.
1776		D. Herd Scots Songs I 118: They’ll fright the fuds of the Pockpuds, For mony a buttock bare’s coming.
1817		W. Scott Rob Roy (1883) 305: Thae English pock-puddings in the Tower o’ Lunnon.
1845		Newry Teleg. 6 July 3/2: ‘Hey, Bob,’ cried a Yorkshire pock-pudding to his fellow laborer.
1845		Western Times 20 Dec. 8/1: They’ll smile, laugh, they can look big [...] They’ll fright the fuds of pock-puds.
1867		E.B. Ramsay Reminiscences of Scot. Life and Character 228: They were naething else but a set o’ ignorant pock-puddings .

2. attrib. use of sense 1.

1822		(con. early 17C) W. Scott Fortunes of Nigel I 31: These English pock-pudding swine.
1832		London Eve. Standard 6 July 3/3: The gentlemen ‘frae the north’ were [...] carrying the war into the enemy’s quarters, to levy black mail from the pock-pudding Southron.
1842		Northern Warder 6 Sept. 3/4: All that ignorance and malevolence which usually characterizes the remarks of English journals upon Scottish affairs, when they do not exactly square with their own pock-pudding notions.
1885		W. Morris in Mackail Life (2008) II 143: I have been getting on pretty well in Scotland, but whether pock-pudding prejudice or not, I can’t bring myself to love that country .

3. a glutton.

1839		Leeds Times 9 Feb. 4/3: An Operative Conservative is a political pock-pudding [...] a toady-eater — a glue-head — a knave.
1842		Leeds Times 5 Nov. 6/1: ‘You are a pock-pudding, all guts and garbage,’ says he.

4. a foolish person.

1913

C. Mackenzie Sinister Street I 155: You pock-puddings, you abysmal apes.