NOTORIOUS troublemaker Ashley Nicholls-Perry bit a taxi driver in the chest during a row over the fare.
Cabbie Howard Harvey drove Nicholls-Perry to a police station when he realised he was not going to pay up.
When they arrived, Nicholls-Perry, who is subject to an anti-gang injunction, sank his teeth through two layers of Mr Harvey's clothing and drew blood.
The 20-year-old former Stroud College music student admitted assaulting Mr Harvey causing him actual bodily harm. He also admitted being in breach of a 20-week suspended sentence for having an imitation firearm. Recorder Michael de Navarro QC jailed him for 46 weeks.
Prosecutor Tim Hills said the taxi driver took Nicholls-Perry and another man from an address in Matson to a garage in London Road.
There was an altercation at the garage between the other passenger and someone else but Nicholls-Perry was not involved in it.
"On the homeward journey it became apparent to the driver that the two people were planning not to pay. He stopped his taxi and the other man got out," said Mr Hills.
"But the defendant remained and instead of taking him home the driver drove him to Barton Street police station – much to Mr Nicholls-Perry's discomfort.
"When he realised what was going on he began to fight with the driver and bit him in the chest, drawing blood.
"A police officer in the station came out, saw what was happening and arrested him. By then the victim had also been punched in the face."
Mr Hills said Nicholls-Perry, who now lives in Gloucester Road, Cheltenham, had "many previous convictions".
Joe Maloney, in mitigation, said Nicholls-Perry wants to put crime behind him and leave Gloucester to take a music course in Birmingham which starts in September.
Recorder de Navarro then did calculations to see what length of sentence he could pass which would allow Nicholls-Perry to be released in time for the course.
"Taxi drivers must be protected," the judge said.
