A Hobart magistrate has described a 27-year-old's excuse that he thought he was going to be strip-searched when he dropped his pants and deliberately exposed himself to police as "far fetched" and "fanciful" .

Sam John Miller blew 0.137 when stopped by police in Morrison Street on Hobart's waterfront at 2:15am in October last year.

In court Miller pleaded guilty to driving a motor vehicle while exceeding the prescribed alcohol limit, prohibited behaviour and using abusive language to police.

The court heard Miller got out of his van when his dog began barking and becoming aggressive towards one of the officers who had intercepted him.

The prosecutor said as Miller was out of his van and approaching police he was asked if he had anything in his pockets. Miller responded by removing his pants, turning his back to police, and exposing his buttocks.

The court heard Miller also invited officers to "check up there".

His lawyer Steven Chopping told the court when officers had asked Miller if he had anything in his pockets, he'd "put two and two together and got 111" and thought he was about to be strip-searched.

Magistrate Olivia McTaggart said she was challenging that belief saying it was "far fetched" and "fanciful".

"I don't accept that you thought you were being strip-searched," she said. "[You] were just making the police work more difficult when they were lawfully apprehending you."

Miller's lawyer argued that it was on the lower end of the spectrum of prohibited behaviour, particularly at that time of the morning.

"It's perhaps not the worst thing that happened that night in that street," Mr Chopping said.

Magistrate McTaggart disqualified Miller from driving for eight months and fined him $640 for drink-driving and a further $300 for the prohibited behaviour and abusive language.