In keeping with CC themes, per Dictionary.com, blame MIT.
WHERE DOES ATMOSPHERIC RIVER COME FROM?
The coining of the term atmospheric river can be traced to the Massachusetts Institute of Technology climate scientists whose research was responsible for the first descriptions of the phenomenon in the early 1990s. The name likens the phenomenon to a river because of the similarity in the transport and flow of water.
Sure! Just saying that our local meteorological crowd never used the term until a couple years ago. 
And we have been swimming in these rivers like forever! (Note my use of “like.” 
)
Perfect use of “like”! “like forever” was One of the examples my linguistics prof gave as to why “like” is useful and in many instances NOT a filler word.
Chilling. Historic. Trope. Words so overused that they are meaningless.
Woke
Never heard it til 5 years ago. Now it’s everywhere.
It’s the bugaboo dejour for some people. Most people had never hear of CRT until it became another bugaboo.
That’s kind of ironic, you know.
Yes, CRT - that’s another good one.
CRT used to refer to a type of television. Now it is something television opinion personalities rant against.
Ironical for ironic sets my teeth on edge. I just find it irritating.
“You know” is another filler similar to “like.” If I know, why would I need you to tell me?
Well, you know, like, because I’m, like, being like friendly or something.
I once had a boss whose use of “you know” was tracked in every meeting.
Typically, in a half-hour meeting, he would say it about 100 times. lol
Why was this directed at me?
Any Succession fans here? The use of the word “Yeah” , which ramped up astronomically with each passing season, put my teeth on edge by season 4. It was like none of the Roy siblings could finish a sentence without tacking a “yeah?” on the end.
Sorry. I just replied the the previous. Natural inclination. I should have hit reply thread.
I stopped reading this thread about 20 posts in once I realized how annoying I am!. 
Said multiple times, but my personal #1, nails on chalkboard, is the use of “irregardless”.
NOC royalty
Like
My truth
Her truth
His truth
Living my/her/his best life
Hella (or any attempt by people to co-opt street language who clearly have no connection to the origin)
Holla!!! (see comment above)
Cray cray, or really anything brought into the mainstream by the Kardashians
The overuse of complimentary adjectives in an obviously insincere way: “She was stunning in that dress.” No, that is my 86 year old grandmother. She looks very nice in that dress. “Stunning” is what my grandfather might have said when he saw her dressed up when they were in their 20s. Let’s be realistic here and not overuse words to the point of rendering them meaningless. Think of the Seinfeld episode and the doctor who described Elaine and the (allegedly ugly) baby as “breathtaking.”
Easterners who refer to low rolling hills as “mountains”. OK, I’m being insincere myself with this one. It doesn’t bother me as much as it makes me quietly chuckle. 
There are more but those are top of mind.
Don’t get me started on malapropisms.
“Before she died”, she did or said XY or Z.
Well, duh.
“While she was living, she prioritized dolphins.”
(you mean she isn’t still prioritizing them as cosmic ether?)