The appalling attack came from a man who had already served 11 years in prison.
Thomas Faulkner, 40, of Earl Street, Grimsby, admitted wounding on December 29.
He had 88 previous offences and it took “very little” for him to lose his temper and it was a determined attempt to bite the victim’s nose, a court heard.
Gordon Stables, prosecuting, told Grimsby Crown Court that both men were in a pub between 2 and 3am.
“This has really knocked my confidence and I feel I need others to go out with”
The victim was making his way to the dance floor in Micawber’s in Grimsby when there was an exchange with Faulkner, who bobbed his head towards him and bit his nose.
“Others alerted him to the injury to his nose,” said Mr Stables.
“It was not bitten off.”
Surgeons stitched the nose back together.
Faulkner was later arrested but claimed that he remembered merely pushing someone but denied causing any injuries.
He had convictions for 88 previous offences, including sexual and violent matters as well as many for theft.
He had been jailed for public protection in September 2005 for inflicting grievous bodily harm with intent and offences including affray.
He was in prison for 11 years but had already been recalled to custody after breaching his licence.
The victim later said: “I have totally gone off the idea of going out in Grimsby.
“This has really knocked my confidence and I feel I need others to go out with.”
He had to take 10 days off work.
“You should be able to go out with confidence and have a good time,” he said.
“The incident has caused unnecessary strain and stress for my family.
“This is not a nice experience to go through. It’s a shame for humanity.
This is not a humane thing to do.”
Judge John Thackray QC told Faulkner: “This was an appalling incident of violence and vicious violence.
“It takes very little for you to lose your temper. You made a determined and, sadly, successful attempt to bite him.”
Andrew Bailey, mitigating, said that Faulkner had been drinking at the time.
“It was drinking that returned him to his old ways,” said Mr Bailey.
Faulkner was jailed for two years and three months and will be on extended licence of two years after his release from prison.