The glossary was recently made public through a Freedom of Information request by the group MuckRock, which posted the PDF, called "Twitter shorthand," online. Despite its name, this isn't just Twitter slang: As the FBI's Intelligence Research Support Unit explains in the introduction, it's a primer on shorthand used across the Internet, including in "instant messages, Facebook and Myspace."

Yes, that does say Myspace.

The gems above definitely needed to be archived. I'm so glad I now know all the leet internet slang the youth of the internet use!

Man on a leash being led around London (Farringdon) surely a stunt for something. #nothingisreal - pic.twitter.com/HAH7mHs6Rq

— Richard James (@richjamesuk) April 11, 2014

Spotted: A woman walking a man on a leash. #lostbet ? pic.twitter.com/CBWNBEqVs2

— Anna Hirtenstein (@ahirtens) April 11, 2014

Taking a moment to imagine uproar if man had been walking woman through Farringdon on a dog leash.

— Heidi Stephens (@heidistephens) April 11, 2014

You know you've lived in London too long when your only reaction to a man being led along on a leash is to roll your eyes and ignore it.

— Ben Meakin (@bnmkn) April 11, 2014

Not sure if drunk guy or clever marketing ploy to appeal to millennials...

Who kkmew theis was ghiong tob e a baweball ghamle. #lowsscorinh 5_0

— JCPenney (@jcpenney) February 2, 2014

Maybe these mittens are the culprit!

We're ready for the big game no matter the temp. Staying warm thanks to #TeamUSA mittens! http://t.co/xzB8FLljox pic.twitter.com/pqocEbkC9K

— JCPenney (@jcpenney) February 2, 2014