Give your head a wobble

[Isthisafreename]

I've seen this phrase used and posters being accused of being harsh/mean for using it but can't figure out why it means what it does. I've never seen it anywhere other than mn (I'm Irish, so it's obviously colloquial). I've figured out that it means to cop on to yourself but why? Where does it come from and how does it mean that?

Also, wind your neck in is another one. I presume that one means to remove your nose from other people's business. It seems a really odd phrase.

Wind yer neck in is a northern phrase. It means to stop arguing/interfering/winding people up.

Give your head a wobble is just "have a word with yourself".

@BelindasGleeTeam - thanks for the explanations. Wind yer neck in is obviously more nuanced than I thought.

It's more the origin and why they mean what they do that I'm wondering about. I'm assuming "wind your neck in" means what it does as if you're interfering you're sticking your nose into someone else's business so if you pull your neck in, you'll remove your nose.

I can't figure out why give your head a wobble means what it does though.