What does it mean to “do one”?

[IamPickleRick]

People say this aggressively as if it means something but I have wracked my brain as to what exactly one is, and it seems like the most empty threat ever.

Do one what? A poo? A little trump? A teeny tiny wee that makes you wish you’d worn a panty liner?

Politer then Fuck off?!

I assumed it meant to leave

Leave

Get lost

On your bike

Very popular where I'm from

Leave

Do a runner.

It means go away where I live. But I don’t know the origin.

Yep. On your bike sonny Jim. Bog off. Scarper. Go away.

Go away

It means fuck off.

I still don’t get why going away or fucking off is “one”. It still sounds like “do a big poo” to me 😂

I always thought it meant do a disappearing act.
Do one.
Gone.
Basically. Fuck off,never appear in my life again.

Frig off.

Fuck right off...cunt.

In the same vein, what does "give your head a wobble" mean? Don't get that one!

It means fuck off. Be gone.

Give your head a wobble means shut the fuck up and think about what you're saying.

Give your head a wobble means engage your brain/wake up/THINK.

To do a bunk.

DS1 told DH to "0121 do one" the other day and DH went batshit.

I'm hazarding that it's a 12 year old version of "fuck off, Dad".

'Do one' is 'do a runner' ie leave.

I always took it to mean fuck off.
And give your head a wobble to mean wake up and engage your brain.