Piers Morgan broke rule number one of Twitter — don't f**k with JK Rowling

Harry Potter author JK Rowling is well-known for slapping people down on Twitter.

We're now several days into a Twitter war between Harry Potter author JK Rowling and Spam-faced stupidity merchant Piers Morgan.

Morgan is fresh from a pyrrhic Twitter spat with the actor Ewan McGregor.

The new Rowling brawl started when Morgan was told to "f**k off" by Australian comedian Jim Jefferies during a debate about Donald Trump's travel ban on Real Time with Bill Maher.

The clip went viral, helped on by JK Rowling.

Yes, watching Piers Morgan being told to fuck off on live TV is *exactly* as satisfying as I'd always imagined. https://t.co/4FII8sYmIt
— J.K. Rowling (@jk_rowling) February 11, 2017

Morgan turned to the Twitter Comebacks chapter in his well-thumbed copy of The Big Boy's Book of Classless Petulance.

This is why I've never read a single word of Harry Potter. https://t.co/XUJBMs4KKm
— Piers Morgan (@piersmorgan) February 11, 2017

Then it got really cringeworthy. Morgan called Rowling out for "priceless humblebrag BS" when she tweeted a gushing blurb about her success. Take a guess who wrote it.

Just been sent this! Could the writer let me know who he is? I'd love to thank him! #Valentines pic.twitter.com/OQtbxPD6AL
— J.K. Rowling (@jk_rowling) February 14, 2017

Priceless #humblebrag BS. Nobody plays the celebrity game more abusively or ruthlessly than you, Ms 'Intensely Private Billionaire'. https://t.co/5ysnfefa3d
— Piers Morgan (@piersmorgan) February 14, 2017

Oh my god. Oh my god. Oh my god. He doesn't realise. This is the best day of my life. pic.twitter.com/fl0lFPHXf5
— Jamie Ross (@JamieRoss7) February 14, 2017

Maybe Morgan should have read Harry Potter, though he's being helped by one book shop which is tweeting The Philosopher's Stone at him.

.@piersmorgan If only you'd read Harry Potter, you'd know the downside of sucking up to the biggest bully in school is getting burned alive.
— J.K. Rowling (@jk_rowling) February 11, 2017

But if he knew Twitter better, he'd have held back from lashing out at Rowling. She doesn't take prisoners.

Well, the fumes from the DVDs might be toxic and I've still got your money, so by all means borrow my lighter. pic.twitter.com/kVoi8VGEoK
— J.K. Rowling (@jk_rowling) January 31, 2017

.@sjosiah0 The Internet doesnâ€™t just offer opportunities for misogynistic abuse, you know. Penis enlargers can also be bought discreetly.
— J.K. Rowling (@jk_rowling) May 8, 2015

In - Free - Countries - Anyone - Can - Talk - About - Politics.

Try sounding out the syllables aloud, or ask a fluent reader to help. pic.twitter.com/K1j19EIU5f
— J.K. Rowling (@jk_rowling) January 28, 2017

@neil1pat @Channel4 Hmm. To date Iâ€™ve donated an eight figure sum to combat social deprivation & MS in Scotlandâ€¦ #bettertogether
— J.K. Rowling (@jk_rowling) September 6, 2014

Two and a half out of six. pic.twitter.com/ZemXVFM5Rj
— J.K. Rowling (@jk_rowling) February 4, 2017

Guess it's true what they say: you can lead a girl to books about the rise and fall of an autocrat, but you still can't make her think. pic.twitter.com/oB7Aq6Xz8M
— J.K. Rowling (@jk_rowling) February 1, 2017

Nice.