NSW Transport Minister Andrew Constance says maritime union workers who are refusing to work on the freshly named Ferry McFerryface are "spoilsports".
Following the announcement of the Sydney Harbour ferry's name on Tuesday, the union said it would boycott the boat due to its "disrespectful" name, saying it was an insult and a "bad joke" that would quickly wear thin.
But Mr Constance defended the new name, which came fifth in a public poll to name six new inner-harbour ferries.
"Sydney voted for this name and we have listened," he said in a statement on Wednesday.
"The union are just a bunch of spoilsports for thousands of kids looking to hop on board."
Maritime Union of Australia NSW assistant branch secretary Paul Garrett says ferry workers have been insulted by the name.
"They should have named the ferry after a prominent or eminent Australian or an indigenous leader," Mr Garrett told AAP on Tuesday.
Ferry McFerryface is expected to hit the water in the coming weeks, once commissioning has been completed, according to Transport NSW.