Twentyspeak 

is a type of spoken jargon in which consists mainly of speaking out acronyms suchs as OMG, OOC, IMHO and many others as part of a regular sentence, where in some cases it is just as easy to speak the words behind the acronym. This is most commonly used by people in their Twenties (aka millennials). Although it was originally used by hackers and gamers as "leetspeak" as a computer elitists vernacular, it's transgressed into spoken language among the millennial mass.

"That girl is so enthralled in everything MTV that I had to use urban dictionary just to understand her twentyspeak. "

Twentyspeak by rich8e8 December 17, 2009

Twentysplain

Having subject matter explained to you by someone in their early 20s who assumes they know everything and you nothing. Recipient being older than 29.

20 something: "Actually, water is not wet"

Person who gives no shits:
"Dont Twentysplain me"

20Something: "Actually Control P does that too"
Person who gives no shits:
"Twentysplaining me again brah?"

Twentysplain by Joe Nofuqs November 3, 2018

Tweetspeak

To cram a "tweet" on Twitter in Twitter's 140 character limit using an intense level of chat-speak ; a hybrid between the terms "chat-speak" and "tweet."

One of the positive few uses for chat-speak.

Here is an example of a normally literate person using Tweetspeak in order to relay his message in under 140 characters:

"@person I'm going2have 2 bail on Noah and the Whale this weekend, man. Sorry. I would love2go,but I'm snowed under w/ an essay deadline."

Tweetspeak by cruizin caleb December 8, 2009