The victim, who is just 17, suffered “deep” burns from boiling water that was poured on him and footage of the harrowing attack was shown to the court.
Brandon Whelpton, Luke West, James Cooper, and Tony Cole were convicted of carrying out the brutal three-hour assault on the teen victim last September.
Prosecutor Gareth Gimson said the gang – aged between 23 and 29 – treated the boy as a “plaything to be humiliated at will”, Nottinghamshire Live reported.
As part of their sickening assault, they forced their victim to strip to his boxers, wrapped a tie around his neck before, stabbed and threatened him with a butter knife, and urinated on him.
Ringleader Brandon Whelpton, 23, showed no emotion as he was sentenced to 12 years and nine months in custody and an extended licence of three years and three months on his release.
Convicting him for causing grievous bodily harm with intent, Judge Steven Coupland told him: “I have no hesitation in deciding you are dangerous.”
Defendants Jake West, Luke West, James Cooper, and Tony Cole pleaded guilty to false imprisonment.
“He became a toy,” said Gareth Gimson, prosecuting. “A plaything to be humiliated at will by these men and, the Crown would submit, tortured.
“This was for fun. He was ridiculed, accused of being a snitch and a grass and a thief.
“The Crown submits it was all nonsense; a pretext for a vicious and quite cruel act on this young man.”
During the ordeal, the victim was made to perform duties as a waiter, then pull down his underwear, and the tie was pulled tight around his neck as he was ordered to sing “Barbie Girl” by band Aqua.
Whelpton, of Arnold, also held the knife to his throat as he demanded he sang.
“He was frightened and plainly confused,” added Mr Gimson. “He was told by Whelpton ‘it will get harder bro’.”
The ringleader then boasted to a girl over a video call and threatened to inflict violence on other people.
He sent a Facebook message to a girl and a 50-second recording of the teenager in his boxer shorts, and then crouched, cowering in a corner.
The girl said he “looked like he had been beaten up” and Whelpton’s voice could reportedly be heard saying “get down and stay down”.
The thug added: “This is what happens when you grass” and “tell Matt he’s next”.
The abused boy pleaded “no, please stop” as the scalding water is poured onto him.
When the victim awoke the next morning he went for a walk and did not return to his home until midnight, where his carer’s partner realised he needed treatment in hospital.
It was later found he had suffered 4% burns to his body. One per cent were described as deep burns and he had also suffered bruising and cuts.
“The whole thing was frightening,” he explained in a victim impact statement.
When asked by cops what was frightening about it, he said “getting kettled”, adding: “I felt like hanging myself I was so scared.”
Cole, 29, was sentenced to three years and seven months; Cooper, 28, was given three years and four months in prison, and Luke West, 24, was jailed for three years and two months.
A fifth defendant, 25-year-old Jake West, was given a three-year community order, two months’ curfew, and a two-year mental health treatment requirement.
Jake, of Pedmore Valley, Bestwood, pleaded guilty on the basis he was not present when the abuse happened but he could hear what was happening.
Luke West, of Benedict Court, Bestwood, was present for some of the humiliated, was one of those pulling the tie around his neck, saw water poured over him, and did nothing to stop it.
Tony Cole shouted at the naked teenager to sing and laughed at what some of the others were doing.