spit the dummy
phrase, idiomInformal
A Australian English slang term. Browse all Australian slang.
What it means
To lose one's temper in a disproportionate, childish way.
Literally: To spit out the pacifier.
In use
He completely spat the dummy when they changed the roster.
No need to spit the dummy over it.
Where it comes from
A dummy is a baby's pacifier. The image is exact: an infant flinging it out of the pram in fury. The phrase always implies the reaction was out of proportion.