A man described in court as a "major alcoholic" has been banned from every pub in England and Wales for two years following an attack in a Devon bar.
Jon McGoff, 35, drank a litre of vodka before punching Dave Gover's face and biting him, Exeter Crown Court heard.
McGoff, of no fixed address pleaded guilty to assault occasioning actual bodily harm and possessing an offensive weapon.
He was jailed for 12 months and banned from pubs for two years.
Emily Pitts prosecuting, told the court how the landlady of the bar in Teignmouth, Lynn Tidborough, saw McGoff fiddling with his arm and thought that he might be armed with a gun.
This prompted Ms Tidborough to ask another customer to call the police.
The prosecutor said; "When McGoff interrupted the landlady of the Kings Arms as she was serving drinks, Mr Gover went over to see what the problem was."
He was then "punched in the face and knocked to the ground and McGoff took another swing at him then sunk his teeth into his arm causing five puncture wounds," the prosecutor added.
The jury heard how when police arrested McGoff, who was very drunk, he was armed with a rolling pin hidden up his sleeve because two men were after him following a row over a girl friend.
Speaking for the defence, Piers Norsworthy said: "McGoff was a dramatic and major alcoholic who had behaved in a disgusting way."
Mr Norsworthy added: "At the time of this offence he was homeless and drinking a litre of vodka a day."
Passing sentence the Recorder Colin Parker told McGoff: "I accept that custody might do little, if anything at all, to get you away from alcohol but you have to be punished for what you did that night."