English phrase from drama scenes

What Does "you don't know who you're messing with" Mean?

Learn what "you don't know who you're messing with" means, when people say it, and how to use it naturally in English.

Intermediate
Rude
Harsh
Warn

you don't know who you're messing with.

This is a warning meaning the other person does not understand how serious or powerful the speaker is.

From Trial Marriage To A Billionaire Season 2, Episode 8

When do people say this?

Scene Context

Someone warns another person that they are underestimating who they are dealing with.

Usage Scenario

Use it in a fight or threatening comeback. It is aggressive and can sound intimidating or hostile.

Better ways to say it

1
You don't know who you're messing with.
2
You don't know who you're dealing with.
3
Don't mess with me.

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