A dumped boyfriend left his former partner terrified by bombarding her with threatening messages during a campaign of stalking.
Imran Mahmood turned nasty after his ten-year volatile relationship with the woman came to an end.
A court heard he has previous convictions in relation to the woman and police have been called out for other allegations which did not result in prosecution.
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Elizabeth Muir, prosecuting, told Newcastle Crown Court he had been verbally abusive to the victim, calling her a "fat s**g" and issuing threats to her and her family and friends.
At the end of November, she told him the relationship was over and he responded with aggression and she had to get the police to remove him from her home two days running.
Miss Muir said: "This led to a bombardment of phone calls and texts.
"They were abusive and threatening and referred to her in particularly unpleasant language and threatened to slander her on Facebook.
"He uploaded her picture saying 'happy birthday you f****** grass' and threatened to assault her and stab her.
"She believed the threats to be genuine and she would not leave her house."
Mahmood, 36, of Allendale Road, Byker, Newcastle, began using a new phone number, from which he sent a barrage of further abusive messages and calls.
In one 24 hour period he phoned her 50 times, the court heard.
He said "there will be murders tonight" and that he would stab her and no one would come to help her.
Miss Muir said more than 200 messages were recorded.
Recorder Andrew Smith said the woman had referred to their former relationship as abusive but that he was only sentencing Mahmood for harassment by way of stalking between November 23 and December 2, to which he pleaded guilty.
The judge jailed him for ten months, imposed a restraining order and told him: "This was an unpleasant offence of harassment by way of stalking against your former partner.
"She's thoroughly tired of this relationship and wants nothing to do with you and you say you acknowledge that and it's time to move on.
"The effect on her in being psychologically damaged and frightened about what you might do next is borne not just of the offence for which I have to sentence you for but as a result of what she says happened over a long period of time, a history with which you might not necessarily agree."
Recorder Smith said Mahmood had sent "sexually offensive" threats and had "backed up the threats by suggesting matters of that nature would be put on social media so her friends would be aware of it".
He added: "She took the threats seriously, she knows what you are capable of."
The court heard Mahmood has 20 previous convictions, including for harassing the same victim and breaching a restraining order against her in 2019.
Lee Fish, defending, said Mahmood acknowledges the relationship is over.
He added: "He is impulsive, immature and doesn't always make positive decisions.
"This is not a bad man, he is just a man who needs to exercise more control over his behaviour and actions."
The court heard Mahmood has already done a "building better relationship" course in the past, had trauma in his childhood and is remorseful.
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