an exclamation of surprise, a euphemism for "by Jove", used so as not to take Jove's name in vain."
► uses
Uses:
"By jingo! that reminds me," he began, lowering his voice a little, "I picked up something else at Bilkley besides your gig-horse, Mr. Hawley.
George Eliot. Middlemarch
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Prince: Good lord! Topper!
Topper: Yes, Your Highness.
Prince: Well, by gads and by jingo with dumplings, steak and kidneys, and a good solid helping of sprouts! I can't believe it! You're the fellow who has single-handedly saved all those damned frenchies from the chop?
BBC. Blackadder, season 3: Nob and Nobility
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"By the living jingo, here's the bag of gold on his breast!"
Mark Twain. Huckleberry Finn.
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"I'm not hankering to be the man that lays hands on you while he's around," Pete announced conclusively, nodding his head toward Buck.
"Py Jingo!" was Hans's contribution. "Not mineself either."