A thug broke a woman's jaw after she told him off for urinating in the sink when she was on the toilet.
William Farrell, 35, urinated on the Michelle McDonald's hand after she complained about his disgusting behaviour, the Liverpool Echo reports.
He had only been seeing the victim for a few weeks when he took her back to his house in Liverpool after a night out.
After she pushed the cocaine-fuelled lout away from her he smashed his TV, prompting her to flee the house in fear.
Farrell chased his victim down Aberdale Road and delivered a vicious punch to her jaw, breaking it in three places.
He claimed he acted in self-defence during a trial, but when being cross-examined, burst into tears and confessed: "I'm sorry."
Farrell, of no fixed address, had denied inflicting grievous bodily harm (GBH) with intent and an alternative charge of inflicting GBH.
The court heard he had been drinking and taking cocaine before the cowardly attack, in the early hours of September 26, 2018.
Giving evidence during a two-day trial, Miss McDonald said Farrell punched her once or twice with a quick combination of blows.
Paul Treble, prosecuting, told a jury how a neighbour came to her rescue, as she lay stricken in the street with the serious injury.
However, he said brazen Farrell then came back and asked Miss McDonald for a cigarette, which she threw at him in disbelief.
The victim was taken to hospital and required surgery, with metal plates being inserted in her jaw, but is now making a good recovery.
She told the court she remains upset by her ordeal and has suffered from anxiety.
Farrell, who gave a no comment interview when arrested by police, tried to suggest that Miss McDonald had attacked him first.
When questioned by Mr Treble, he accepted that he urinated in the sink when she was on the toilet and claimed this was "normal".
He denied urinating on her hand before he started crying and apologised for his attack, to the astonishment of a shocked jury.
After being given time to speak to his barrister, Brendan Carville, he admitted the lesser offence, which was accepted by prosecutors.
The court heard Farrell has previous convictions for offences including assault, burglary, theft and failing to comply with court orders.
Mr Carville said his client had shown "real remorse" when he broke down crying in the middle of cross-examination.
He said Farrell insisted it was only one punch and argued that it was not a case of "higher culpability", as set out in sentencing guidelines.
The judge, Recorder Terence Rigby, said Farrell had "undoubtedly" inflicted a serious injury on his victim.
He said: "My judgment as to what happened is that having drunk a great deal, having taken cocaine, you lost your temper and you lost your head.
"You chased this girl down the street and when you caught her, your hit her with one punch but very hard and broke her jaw in more than one place.
"As has been said, the result of that was that she has ended up with metal plates securing her jaw.
"She still has a degree of anxiety and the result of all that is it's a serious case where you have caused serious harm."
However, he said "with some element of reluctance" he accepted it was not a higher culpability case, meaning a lower starting point for sentence.
Recorder Rigby said he also gave him "a little bit of credit" for his guilty plea "albeit at the very last moment", which showed "a degree of remorse".
He jailed Farrell for 18 months and imposed a two-year restraining order, preventing him from contacting Miss McDonald.
