So the Premier of Victoria (an Australian state) posted this on twitter yesterday
Someone shared it on Reddit asking if that was appropriate language for an Australian politician to be using and the entire thread is just Australians saying “only a dickhead would think this is a problem”.
There was briefly a popular brand of matches called ‘Dickheads’ in Australia
However, it is extremely unlikely that this is what Jacinta was referencing, as the government frequently swears at Australian citizens in its comms if it wants to signal the message is serious.