to give your head a wobble

9.9

Tell someone to think again because they are not being reasonable

idiom

Australian

: reflexionar

If you believe that story, you need to give your head a wobble and think again.

Examples

I told her to give her head a wobble and stop overreacting.
You really need to give your head a wobble!
Before making such a ridiculous accusation, maybe give your head a wobble.
Did you give your head a wobble after that argument?
If you think that's a good idea, it's time to give your head a wobble.
She needs to give her head a wobble and reconsider her decision before it’s too late.
After hearing the news, he really should give his head a wobble and reassess the situation.

Synonyms

to take a step back

vsto give your head a wobble

53 4.1

To pause and think again about a situation to see the bigger picture

is more a direct admonition to rethink rather than calm perspective taking

to give one's head a shake

vsto give your head a wobble

Informal

8.6

Make yourself stop worrying and start thinking clearly

is a milder instruction to reconsider ideas that seem unreasonable

Surface Forms

give your head a wobble infinitive

gave your head a wobble past

given your head a wobble past participle

giving your head a wobble present participle

gives your head a wobble third person singular

Morphology

give + your + head + a + wobble

The literal constituents ('give' + 'your' + 'head' + 'wobble') clearly suggest a physical action — to move or shake one’s head — which a B1 learner who knows the words can infer. However, the idiomatic use meaning 'reconsider/rethink' is a metaphorical extension of that physical image and relies on pragmatic/cultural knowledge, so the mapping is not fully predictable without prior exposure.

Etymology

The phrase give your head a wobble comes from the image of giving your head a small wobble, a quick tilt or shake to try to clear your thoughts. So it tells someone to 'think again' or 'reconsider'.