Green’s Dictionary of Slang

juggins n.

[var. on muggins n.1 (1); Note Henry Ernest Schlesinger Benzon, better known to London’s sporting fraternity as the Jubilee Juggins. Benzon, the son of a Birmingham umbrella frame-maker, went through an inheritance of £250,000 (a massive sum at the time) in less than two years. His last pennies went in 1887, the year of Queen Victoria’s Golden Jubilee, thus earning him his nickname. Only the kindness of his fellow patrons of the raffish Romano’s Restaurant in the Strand, who established a fund that sustained him on £7 a week for life, saved him from absolute penury]

a fool, a dupe, esp. someone who is so foolish that they can be prevailed upon to buy every round of drinks.

[UK]R.S. Surtees Handley Cross (1854) 137: Hooi, you rogue! [...] You’ve all but been the death of Mrs and Miss Juggins and myself.
[UK] ‘’Arry on His Critics and Champions’ Punch 14 Apr. 180/1: It’s only th’ jugginses grumbles at me and the Mashers, der boy.
[Aus]Bulletin (Sydney) 28 Feb. 22/3: If Juggins should happen to turn upon the siren distrustfully, she may laugh or beg his pardon, allege that she took him for her father or brother and skip merrily away, but if he does not, the gonoph in front may have a fine time of it.
[UK]G.R. Sims ‘A Derby Ditty’ Dagonet Ditties 15: The biggest juggins that ever was known.
Ware & LeBrunn Listen with the Right Ear [ebook] But should Jennie Juggins ask for a little loan, / Don’t you hear a word of that, be as deaf as stone.
[Aus]Truth (Sydney) 18 Nov. 1/3: Our Labor representatives are all Judases or Jugginses.
[UK]J. Masefield ‘Evening-Regatta Day’ in Salt-Water Ballads 50: You’re the juggins who caught a crab and lost the ship the Cup.
[Aus]Sun. Times (Perth) 8 Mar. 1/1: The jim-a-week juggins handed the flower over.
[Aus]Bulletin (Sydney) 3 Sept. 39/2: ‘No, you’re the jugginses wot give her the yellow boys all mixed up with the casers. That’s why they cleared.’.
[Aus]Truth (Melbourne) 31 Jan. 6/1: One old juggins, with gold-rimmed gig-lamps and a bulge like a barrel.
[UK]‘Taffrail’ Pincher Martin 341: Any silly juggins could have seen that she was innocent!
[Ire]Joyce Ulysses 74: Poor jugginses! Damn all they know or care with their long noses stuck in nosebags.
[Aus]‘Banjo’ Paterson Shearer’s Colt 139: Is he a rich juggins, or could he walk down Threadneedle Street without somebody selling ’im the Bank of England?
M. Marples Public School Slang 67: Jackass (1823) and juggins (1882 [...] ) are typically nineteenth century.
[UK]I. & P. Opie Lore and Lang. of Schoolchildren (1977) 200: He has behaved like a chump [...] or a juggins.