English phrase from drama scenes

What Does "i mean he's definitely up to something" Mean?

Learn what "i mean he's definitely up to something" means, when people say it, and how to use it naturally in English.

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English Phrases for Work

I mean he's definitely up to something.

It means the speaker thinks someone is secretly planning or doing something bad or sneaky.

From Blood Contract, Episode 4

When do people say this?

Scene Context

The speaker says they suspect someone is hiding a plan.

Usage Scenario

Use this in everyday conversation when you suspect someone is hiding something. It is common, but the tone can become accusatory if you say it strongly.

Better ways to say it

1
I mean he's definitely up to something.
2
He's up to something.
3
I think he's planning something.

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English Phrases for Work