A MAN who encouraged a backyard tattooist to draw a 40cm long penis on another man's back has been jailed.

Christopher William Lord, 23, was sentenced in the Ipswich District Court after pleading guilty to assault occasioning bodily harm while armed and in company.

At 10.30am on October 18, 2010, Lord was at the Ebbw Vale home of his friend Matthew Francis Brady, 24, who was sentenced in 2011, when a third man, the victim, came to the house.

The court was told the victim, who is on a disability pension, was accused by Brady of raping a girl, which he denied.

The court heard Lord then hit the man in the groin.

The three men then began drinking rum and Brady and Lord tried to convince the victim to let Brady tattoo him.

The man eventually agreed to have a yin and yang symbol with a dragon and tiger tattooed on his back. Lord and Brady took him into one of the bedrooms in the house to tattoo him.

The court heard Lord continued to encourage the man, telling him he knew of a girl who would sleep with him if he got the tattoo.

Brady then began tattooing the man, drawing a penis, testicles and an obscene phrase under it.

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The victim complained the tattoo hurt and asked Brody to stop, however he kept drawing.

Lord reassured the victim the tattoo looked "mad" and that Brady was starting to draw the dragon after finishing the yin and yang symbol.

Brady eventually finished and Lord told the victim to cover the tattoo up.

The three then went into the backyard of the house where Brady again accused the man of raping a girl, which he again denied, before assaulting him. The victim then fled the property and showed the tattoo to friends, who told him it was a drawing of a penis.

The tattoo has since been covered over after an Ipswich tattoo artist donated his services to the man.

The court heard at the time of the offence Lord was on bail for armed robbery, which he was sentenced for after this offence took place.

A reference was tendered to the court on behalf of a Gold Coast church where Lord works.

Judge Greg Koppenol described the tattoo as "appalling" and said Lord and Brady had taken advantage of a vulnerable man. "It was a miserable offence," Judge Koppenol said. "You acted miserably towards a vulnerable young man with a significant disability."

Lord was sentenced to 12 months prison, with a parole release date on March 12.