English phrase from drama scenes

What Does "you're making a very big mistake" Mean?

Learn what "you're making a very big mistake" means, when people say it, and how to use it naturally in English.

Beginner
Neutral
Firm
Warn

You're making a very big mistake.

It means the speaker believes the other person is about to do something wrong or harmful.

From Help! I’m Falling In Love With My Rude CEO, Episode 31

When do people say this?

Scene Context

Someone warns another person that they are about to make a serious error.

Usage Scenario

Use this to warn someone before they do something risky or foolish. It can sound harsh if said angrily.

Better ways to say it

1
You're making a very big mistake.
2
That's a big mistake.
3
Don't do that, you'll regret it.

How to learn English with ReelFluent

1
Discover

Scenes unlock real expressions as you watch

2
Understand

Tap to translate or use dual subtitles

3
Use

Practice immediately with AI Characters

4
Retain

Reinforce with quick quizzes and repetition

Learn practical English from scenes, not drills.

Build speaking confidence with drama-based context, instant explanations, and AI-powered practice tailored to real conversations.

Start learning

How to Warn Someone in English

English Phrases for Work