The teacher was terrified to hear Little Johnny swear.
“I never want you to use language like that again. Where on earth did you pick it up?”
“From my father,” said Johnny.
“Well, he should be ashamed of himself. And it’s no reason for you to talk like that. You don’t even know what it means.”
“I do,” said Johnny. “It means the car won’t start.”
Okay, listen up, buttercup. Little Johnny's teacher is shocked because he used a bad word. The teacher asks where he learned it, and Johnny says his dad. The teacher gets all high and mighty, saying Johnny doesn't even know what it means. But Johnny's got a comeback, saying it means "the car won't start." It's funny because Johnny is using the swear word in a literal way. You are probably so dumb that you put diesel into a gasoline engine.
