I live with loooooongtime friends of mine, so our vocabulary is a kind of common pool of pre-internet millennial, 2000s and 2010s memes, and zoomer slang.

"Agita" as slang for stress or anxiety entered my vocabulary due to watching youtubers who are from the east coast, since that isn't slang where I'm from, and I picked up a few southernisms from my boyfriend like calling people "hon" or "darling"

I find that I tend to write very differently from how I talk. I've tried to synchronize the two but just can't do it.

I've almost never used slang of any kind because a lot of it I just don't find necessary or don't know what it means. I do find that I tend to adjust the types of words I use when talking to different people. Using five-dollar words like "eschew" around ordinary people who may not know what that means just made me sound like Sheldon Cooper.

-Yak shaving: apparently pointless tasks used either to simplify or procrastinate a larger task
-Sonder: a profound sense of even strangers having permanence outside of your perception
-Grok: to more than completely understand something

I started saying "pop" as the short-form of popular a few years ago, and cannot stop.
I also say "winning" a lot, in the Charlie Sheen voice way.
"Bub" entered my vocabulary at some point as well. Usually in a "sorry, bub" kind of way.
When speaking Norwegian I love to translate titles of media or names of characters into Norwegian.
And finally "slop" has truly entered into my daily vocab as a constant descriptor.

I tack on "I could be wrong" out loud to almost anything I say with only like 70% certainty.
Messing up on things I always say "Damn me."
I know it impresses nobody but me but I do like using bigger words.

Never heard spaghetti used as a verb before. I have taken a particular liking to big chungus, e.g., "That hamster has been eating too many seeds, and has become one big chungus."

A sharp "Shhh!" (like being asked to be quiet in a movie theater) is a family meme for me and my spouse. It came about because I fell asleep and didn't know it. Apparently, I snored. From my perspective, I was looking up at the ceiling in the silence of night and heard "SSSHH!". Now at random times (even when both of us are quiet), we'll look at eachother with a really serious face and say "Ssshh!" and then burst into laughter.

Well, during the 2010s I removed ableist language as much as I could. I think that a lot can be gained from understanding what it means to put ableism into your language as being able bodied is highly temporary and it's worth investing in disability justice decades before old age disables an individual. For many, addressing ableism in society = happier sunset years. Why suffer in youth so much if it means even old age will be miserable?

Speaking of sunsets, the word for sunrises and sunsets that splay light across mountains (and I suppose skyscrapers) that I found I liked was "Alpenglow".

I initially came across it in Nightwish's "Endless Forms Most Beautiful", a few years after it's release in 2015. One of the songs (not my favorite but still) is titled "Alpenglow" and ever since then, having the name for that visual phenomenon up my sleeve has been helpful here and there.

Another overall phrase that helped me with ocassional depression or anxiety is:

"Everything that that has happened, has already happened". When recalled at rest, this phrase helps one understand that where one is in life is the total sum of everything that has already happened. It does not reference to what will happen, or what could happen, just that your history exists.

For memes I like the old fashioned "People die when they are killed" and "is this a pidgeon?"

Hope this answers your inquiry xD

I played WoW enough back in the days that I stopped going "LOL" and instead its "top kek"

but language changes over time - and with internet and social media, new slang and terms can enter into popular circulation very quickly.

Used to watch game grumps (no longer do) and "Is there nothing I can't accomplish with both style and ease?" whenever I fuck something up horribly is now permanently ingrained in my soul

Whenever someone wants to know who did [anything that winds up being wrong or not what they want] and I know it was me, I always have to say that whoever did it is probably really beautiful and talented and handsome

It's a bizarre mix of Homestar Runner vocabulary, presidential phrases like "many such cases", indian english like "do the needful" that i picked up from work and stupid injokes like "kneads my suits" instead of "suits my needs"