We don't have synonyms for juggins yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are muggins, wuggins and huggins.
(n) :
a fool; someone very credulous or easily fooled
"1942: this boy, though at present a juggins, had the makings of a superb creature. -- Rebecca West, Black Lamb and Grey Falcon (Canongate 2006, p. 788)"
(n) :
a fool; someone very credulous or easily fooled
"1942: this boy, though at present a juggins, had the makings of a superb creature. -- Rebecca West, Black Lamb and Grey Falcon (Canongate 2006, p. 788)"