A University of Central Florida student who graded his ex's misspelled apology note then tweeted it, has been suspended for cyber bullying.

Nick Lutz received the letter from his former flame earlier this year, apologizing for her behaviour during the relationship. But he took the ultimate revenge by picking up on the mistakes in the letter in red pen and sharing it on Twitter.

The tweets of the note, which he graded as a D minus for repetition and bad handwriting, quickly went viral, prompting his ex to file cyber-bullying claim.

While prosecutors never pursued the charges, Lutz says he has been suspended from his school - despite the fact that his former girlfriend is not a student there.

When Nick Lutz received an apology letter from his ex girlfriend he got the ultimate revenge by marking it and returning it to her before posting pictures of it on Twitter

But Lutz says his letter landed him in hot water and he has now been suspended from university

'Looking back at it now, it's probably the craziest thing that will ever happen in my life,' he told WFTV.

'My main goal was never to expose her. It was to show the emphasis on the letter,' he added.

But the University of Central Florida believes the tweet violated its code of conduct for disruption and cyber-bullying and have suspended him for two semesters and put him on probation.

Lutz’s attorney argues that it is a violation of his First Amendment right to free speech.

'That should really, fundamentally, concern people. Not only those who are students, but people who believe in the idea of freedom of expression,' said attorney Jacob Stuart.

In the photos of the letter he tweeted out in February, Nick picked up on his ex girlfriend's handwriting and 'contradictory' argument.

Marking her mistakes throughout with a red pen Nick eventually wrote a summary on the back for his ex.

Marking her with 61/100, and a grade D minus he says: 'Long intro short conclusion. Strong hypothesis but nothing to back it up. Details are important.

'If you want to be believed, back it up with proof. You claim that cheating never occurred but place blame on yourself - then what for?

In the photos of the letter shared on the social media site Nick (pictured) picks up on his ex girlfriend's handwriting and 'contradictory' argument

Nick gave his ex-girlfriend a final mark of 61/100 in what he dubbed an equivalent to a grade D minus

'Need to stop contradicting your own story and pick a side. While this gesture is appreciated I would prefer details over statements.'

He took photos of his edits to the four sides of the letter and shared them with his 2,000 followers accompanying the pictures with a tweet.

It read: 'When your ex writes you an apology letter so you grade it to send it back'.

The tweet was shared and liked hundreds of thousands of times.

Plenty of Twitter users came forward to support Nick pointing out other mistakes that Nick had missed in the letter.

In a bizarre twist Nick actually landed himself a date after Twitter user Fresh Face Splendor expressed her interest.