English phrase from drama scenes

What Does "i don't know" Mean?

Learn what "i don't know" means, when people say it, and how to use it naturally in English.

Intermediate
Rude
Firm
Accuse

Like I don't know what you were doing with your manager all night

A suspicious way to imply someone was doing something wrong all night.

From My Sister Stole My Man, Episode 30

When do people say this?

Scene Context

The speaker is accusing someone of doing something suspicious all night.

Usage Scenario

Use it in an argument when you suspect dishonesty or cheating. It sounds accusatory and may escalate conflict quickly.

Better ways to say it

1
I don't know what you were doing all night.
2
What were you doing all night?
3
I know you were up to something all night.

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How to Accuse Someone in English