A British Columbia judge has ordered a social media influencer to pay $200,000 to an ex-boyfriend after she spread rumors online about him giving sexually transmitted diseases to other women.

Supreme Court Justice Elliott Myers handed down what is considered to be a landmark ruling against fashion blogger Noelle Halcrow.

In 2015, Halcrow, who boasts more than 17,000 followers on Instagram, began an on-again, off-again relationship with Brandon Rook, a business consultant who lives in the Vancouver area, according to court documents.

After he ended the relationship, Halcrow posted dozens of internet messages on various sites accusing Rook of knowingly infecting other women with herpes and of being unfaithful.

‘Brandon Rook, known cheater, proud of it!’ read one message posted by Halcrow.

A Canadian judge has ordered social media influencer Noelle Halcrow (left) to pay ex-boyfriend Brandon Rook (right) $200,000 in damages after she accused him of knowingly spreading sexually transmitted diseases to other women

Halcrow posted scores of messages online defaming Rook after he ended their yearlong off-again-on-again relationship

Halcrow boasts more than 17,000 followers on Instagram. A British Columbia judge ruled that she waged a 'relentless' campaign online against Rook 'out of spite'

‘Has STDs spreads them to people,’ read another post.

Halcrow, who splits her time between Los Angeles and Vancouver, also accused Rook of being an alcoholic and of being ‘uncaring’ and a ‘loser.’

‘She went on and published time and time again, over many days - actually a year, or maybe more than that - various versions of the same statement that the guy was a dog, basically,’ Bryan Baynham, a defamation lawyer, told CTV.

In his ruling, Myers found that Halcrow was lying and that she had conducted a ‘relentless’ campaign ‘out of spite.’

In his ruling, the judge cited dozens of online posts accusing Rook of infidelity, alcoholism, misogyny, abusive behavior, and spreading STDs

Myers listed 100 posts that he determined to be defamatory.

Halcrow’s unusually large social media following means that the penalty she was given was higher than it would be for most other online users.

‘It's like publishing a defamatory statement to the world,’ Baynham said.

‘It's worse than publishing it in a newspaper in many cases. It's very serious and you better have the facts to back it up.’

Halcrow denied she was the author of the posts, but forensic experts managed to trace the content back to her IP address.

The Instagram accounts used were of names and handles that included brandonrook.baterogold; br._rook_; and brandon.rookbatero.

‘Batero’ refers to Batero Gold, a mining company that once employed Rook as chief executive officer.

Halcrow also wrote posts on web sites alleging he was guilty of infidelity and of transmitting sexually transmitted diseases.

In his ruling, Myers also cites text messages from Halcrow to Rook in which she threatens to write more incriminating posts.

One text message read: ‘I told you second I posted pics. This time you need to search for them and figure how many people I tag.

‘Stupidly I took down but easy get back and I own this account names.

‘And only thing you can get deleted on Instagram is porn.

‘My account people say bad things I own it so I can take down two seconds and alerts my phone.’

DailyMail.com has reached out to Halcrow for comment.