Man jailed after egging on tattoo artist to draw 40cm PENIS on his friend's back without him knowing.

Christopher William Lord was sentenced to 12 months behind bars for the incident on Friday, after the tattoo artist himself was jailed.

A man has been jailed after egging on a tattoo artist to draw a 40cm PENIS on his friend's back without him knowing.

Queensland-born Christopher Michael Lord was sentenced to 12 months behind bars on Friday, some three years after the incident occurred.

The tattoo artist, Matthew Francis Brady, was jailed.

Lord persuaded the victim - who is disabled - to get a ying and yang tattoo.

But then when the work was undertaken Brady drew the graphic image instead along with an obscene phrase.

Lord pleaded guilty to assault occasioning bodily harm at Ipswich district court.

Judge Greg Koppenol was withering in his assessment of the crime.

"It was a miserable offence," he said. "You acted miserably towards a vulnerable young man with a significant disability.’