A nightmare boyfriend battered his ex-girlfriend then broke her dad's teeth when confronted over the .
Michael Caddick was in a relationship with Courtney Ryan for around six years and they have a 16-month-old girl together.
But she split up with him last June and moved into a women's refuge, when a six-month non-molestation order was made.
Liverpool Crown Court heard as soon as it expired Caddick, 38, of Rokesmith Avenue, Wavertree , contacted the 26-year-old.
Kate Morley, prosecuting, said she tried to "fob him off", but he went to her home around 7.30pm with Christmas presents for their daughter.
Miss Ryan agreed he could come in to talk, however, after having a drink, he asked who she had been seeing and turned "nasty".
He showed the mum a photo of another woman on his phone to try and upset her, then threw the device at her head.
She asked him to leave but he refused, laughed and pushed her, before kicking her in the leg and slapping her head.
Ms Morley said: "He grabbed her hair and pulled out her hair extensions."
The victim, who suffered a bloodied nose and bruising, managed to get him outside, but he banged on the door.
Caddick yanked and damaged a kitchen window, before Miss Ryan fled upstairs to her daughter's bedroom and he left.
Ms Morley said Miss Ryan's parents were "extremely worried" when she called to say what happened.
They lived near Caddick and after hearing him return home in his car, Vicky Ryan, 51, called the police.
Ms Morley said David Ryan, 48, was "so upset" he decided to speak to Caddick and took a snooker cue with him.
Mr Ryan knocked on the door and said he wanted to talk, but Caddick took off his t-shirt and "flew at" the grandad.
He hit Caddick with the cue before the bully punched him, they scuffled on the ground, and Caddick got to his feet.
CCTV footage showed him kick or stamp on Mr Ryan five times, walk away, then return and deliver two more kicks.
Police arrived shortly afterwards and found Mr Ryan with fractured teeth, plus bruising to his face, left wrist and right shoulder.
Caddick had disappeared and at 6.50am on Christmas Day sent Mrs Ryan abusive and sexually explicit WhatsApp messages.
Those that can be printed included "don't bring a knife to a gunfight, I'm glad your fella is a s***house" and "your slag is in trouble".
Police found him in bed at his mum's house just after 8am, with dried blood and a small cut to his head.
He denied any wrongdoing, claiming Miss Ryan had lashed out at him and he only hit her dad in self-defence.
But on December 28 he made threatening phone calls to her brother Michael, 24.
Caddick was sentenced over those calls by magistrates, who handed him a community order for harassment.
Miss Ryan said it was a "toxic" relationship and she was "manipulated, bullied, controlled and physically abused".
The victim said she lost her confidence, felt "worthless" and was told she may have PTSD.
Her dad said he was excited for his granddaughter's first Christmas, but spent the day in A&E and feared for his daughter.
Caddick admitted criminal damage and sending a malicious communication, but denied common assault and assault causing actual bodily harm.
He admitted the two attacks on the opening day of a trial, on the basis the second began in self-defence, but became excessive.
Caddick said he kicked and punched Mr Ryan's arms and legs when he was holding the snooker cue because he feared another attack.
Carmel Wilde, defending, said Caddick was ashamed but it was "a very volatile relationship on both sides", with him also reporting Miss Ryan to police.
The lawyer told the court the violence was "very much out of character" for the convicted cannabis dealer.
She said Caddick worked for Jaguar Land Rover for eight years, but lost his job because he was asked to work longer shifts and couldn't due to diabetes.
Ms Wilde said he had drink and drug problems and suffered depression, adding: "He feels he's angry at the world and he's hurt inside and that's led him to hurt others".
She said: "It seems from his childhood he was passed from pillar to post, with his father being an alcoholic and his mother not really bothering with him - she was more concerned about her relationships with other men.
"In his words he says he's not proud of his behaviour, particularly towards women, he feels he had no guidance in life and knows he needs counselling."
Judge David Aubrey, QC, said Caddick attacked Miss Ryan while their daughter was at the home after "the red mist descended".
The judge said her dad "unwisely" provoked him and struck the first blow, but Caddick repeatedly kicked and stamped on him.
Jailing him for nine months, he said: "There must have rapidly come a time when you realised he was defenceless and he was no threat whatsoever."
