English phrase from drama scenes

What Does "that's not best friend behaviour" Mean?

Learn what "that's not best friend behaviour" means, when people say it, and how to use it naturally in English.

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That's not best friend behaviour.

It means a close friend is not acting loyal or supportive.

From My Sister Stole My Man, Episode 3

When do people say this?

Scene Context

The speaker criticizes a friend's behavior as unacceptable.

Usage Scenario

Use this when calling out a friend’s bad behavior. It can sound hurt and confrontational.

Better ways to say it

1
That’s not best friend behaviour.
2
That’s not what a best friend would do.
3
A real friend wouldn’t do that.

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