What does "Pull your head in" mean?
It means stop showing off, stop interfering, or bring yourself back into line. It is a blunt way of telling someone they have gone too far.
The saying in a sentence
The saying
Pull your head in
Example
Pull your head in, mate.
When you use it
Use it with a mate who is talking themselves up or sticking their nose in.
When you do not
It can sound aggressive. Skip it with strangers, kids, or anyone you need to stay polite with.