abstract:The expression "by Jingo" is apparently a minced oath that appeared rarely in print, but which may be traced as far back as to at least the 17th century in a transparent euphemism for "by Jesus"."Jingo, Online Etymology Dictionary, referring to OED The OED attests the first appearance in 1694, in an English edition of the works of François Rabelais as a translation for the French par Dieu!