When someone says, “I’m dead serious,” it means they are completely sincere or very serious about what they are saying. It’s just like saying “I’m entirely serious” or “I’m not joking.”
Here are two examples in sentences:
Example 1:
When John told his friends that he was moving to another city, he had to convince them that “he’s dead serious.”
Example 2:
Sarah told her parents she wanted to study abroad. When they thought she was just fantasizing, she assured them, “I’m dead serious.”
Now, let’s see two examples in a conversation:
Example 3:
Mike: Hey, Emma! I’m thinking about starting my own business.
Emma: Really, Mike? Are you joking?
Mike: No, Emma. I’m dead serious.
Example 4:
Lisa: Hi, Ben! I’ve decided to run a marathon.
Ben: Lisa, are you kidding? You hate running.
Lisa: I know, but this time, I’m dead serious.
In summary, the phrase “I’m dead serious” is used when someone wants to emphasize the seriousness or sincerity of what they’re saying. It’s a strong way to assert that they’re not joking or making things up.
