Cách sử dụng
The expression "by jingo" is an old-fashioned English phrase that was popular in the past, but you might not hear it used often nowadays. It's an exclamation that people used to say when they were surprised, excited, or angry about something. For example, if someone exclaimed "by jingo!" when they heard some exciting news, it would be like saying "Wow! That's amazing!" or "Goodness gracious!" It's not a phrase that you would use in formal situations, but it might be appropriate in a casual, conversational setting among friends or family members.