"bend the knee"
"Sweet summer child"
And other phrases from GoT that people now pretend they've been saying their whole lives

"Who hurt you?"

These days, that's shorthand for "I'm an emotionally stunted liberal who is so incapable of self-reflection that anyone who disagrees with a point I have must be acting from a place of unresolved trauma". It's always felt like people-who-definitely-used-to-post-to-4chan burning extra words to get to the r-slur they so desperately want to use; but with the exact kind of plausible deniability that gets their squishy bits either hard or wet.

More of a grammatical mistake, but "should of" instead of "should've" or "should have" annoys the hell out of me for some reason. I completely get how people make the mistake, but it's as much effort as just typing it correctly.

"The proof is in the pudding." It makes zero sense! The actual adage is, "The proof of the pudding is in the eating." It means that a dessert can look perfect and enticing, but if the cook used salt instead of sugar it will taste disgusting.

I don't know what people even think they're saying with "the proof is in the pudding".

"Would of" annoys me to no end. Which is silly because English isn't my first language and I know I make many mistakes, but would of is just... Ugh. Ick.

I do the "eh" thing sometimes without thinking about it but I agree with you, I don't like being on the other end of it either. I'm trying to work on that

Never mind I found it

...took the effort to nvm-d the post, but did not share how, where, or what etc

I recently heard someone say after they almost accidentally went in a wrong building entrance, "Good thing I didn't do that or I would regret my life choices."

A bit much for something minor that created no more than two seconds of awkwardness.

Calling someone a bot or a shill because they post something you disagree with. It's so stupid. Like even if the person is a bot, would that matter if the point they're making is salient and sourced?

"I don't need to engage with the fact Biden has deported more people than Trump, because you are actually russian. Thus I have no reason to investigate my worldview."????

It's also such a tell. Like the person can't imagine anyone thinking anything other than what they think, so they must not be real people with internal lives. Can't imagine independent thought, literal NPC behaviour.
Especially because it's always the most average of redditor-take-havers that say it.

"Hence why"

Syntactically makes no sense. Just say "that's why," that's what you are trying to say.