Still in the last question (Differences). I'd like know anythings, and only one help.?

Question

I need help in idiom; if someone wants to need me, use the address: [e-mail]

It’s on (slang)

I've a test and need help of the native (British)

Answer 1

If they are giving you tests on slang, you should find a better school or teacher. There are far more important things you need to learn.

'It's on' means something is turned on – such as an electrical appliance. The opposite would be 'it's off'.

As a modern British juvenile idiom it probably means something's good (on) or bad (off).

Answer 2

Que?