[Image via Gawker]

The Federal Bureau of Investigation released an internal memo detailing about 2,800 acronyms and shorthand used on Twitter.

READ MORE: Here Is The FBI's Official Twitter Guide To Slang

They released the 83-page manual after a Freedom of Information Request from the website MuckRock and details the obvious like SMH ("shaking my head") and SRSLY (seriously) and the not-so-obvious like SOIDH ("screenshot or it didn't happen").

READ MORE: The FBI Has A Manual Detailing Every Piece of Twitter Slang

There's also a lot of others that might surprise you, but that you might start incorporating in your own lingo.

LISTEN: FBI Has Its Own Twitter Slang

There's IITYWTMWYBMAD ("if I tell you what this means will you buy me a drink?"), PMYMHMMFSWGAD ("pardon me, you must have mistaken me for someone who gives a damn") and, of course, EOTWAWKI ("end of the world as we know it").

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