CONCORD, N.H. (AP) — A New Hampshire man told the state's highest court Thursday that denying him a vanity license plate that reads "COPSLIE" violates his political free speech rights.

David Montenegro, who last year legally changed his name to "human," said he wanted the plate because he feels it highlights government corruption.

Lawyers for the New Hampshire Civil Liberties Union, who joined the case, say the current DMV regulation is unconstitutionally vague and gives too much discretion in a person behind a counter. The policy prohibits vanity plates that "a reasonable person would find offensive to good taste."

"So if a person at DMV agrees with the sentiment, he gets the plate?" Chief Justice Linda Dalianis asked during a spirited half-hour of arguments.

"What is good taste?" Justice Carol Ann Conboy asked. "That seems to be the nub of the argument."

Senior Assistant Attorney General Richard Head argued that state workers were right to deny the plate in 2010, because the phrase disparages an entire class of people — police officers.

"I don't deny you might get two different decisions from two different people," Head said in response to a question about whether a plate reading "COPS R GR8" would be approved.

Anthony Galdieri, an attorney representing the civil liberties union, argued that an accusation is nothing more than viewpoint.

Justice Gary Hicks questioned how the court could restrict someone's ability to have an opinion. Head replied that the license plate's wording was an allegation, not an opinion.

Gilles Bissonnette, another NHCLU attorney, said "COPSLIE" is political speech that is being regulated and suppressed by the government.

"There's no way to objectively enforce this regulation," Bissonnette said.

After court, the plaintiff said he thought police officers who might pull him over and have to type "COPSLIE" into their computers would amount to "the perfect situational irony." He said he was confident the court would invalidate the DMV provision, despite opening his argument by telling the justices that the only reason the case had reached their level was because of a corrupt judiciary.

He also acknowledged that he had been arrested twice, but would not say what the charges were.

The justices did not indicate when they would rule.