There will always be new slang. The funny one, I think, is "cool", which has not only held its popularity but also its meaning, through several generations.
Back in the 90's, Orla Brady was a 'biscuit.' In this decade, she's a total 'smoke show.' Word. I'm just sayin'.
Sup, dog used to mean telling your canine companion to consume his evening meal. Now, it's how you greet your homies.
And "sick" once meant "ill", "dank" meant "wet and chilly", and "the s***" meant digestive end-product. Now these things are all apparently good.
"Square" in the sense of rigidly conventional or old-fashioned has been around since the mid-1940s. It's odd that saying something is "the shit" means the complete opposite of saying something is shit!
A study on accents in the UK https://phys.org/news/2022-06-reveals-prejudice-people-northern-english.html Evidence of compensatory attitudes was also uncovered whereby people in the north were often also "stereotyped as being friendly, outgoing and trustworthy." On Words https://medicalxpress.com/news/2022-06-reveals-tradeoff-complex-words-grammar.html On poetry https://phys.org/news/2022-06-sensations-experienced-poetry.html The aim of the doctoral thesis was to study the palpability of language, i.e. sensory saturation, which has not found sufficient analysis and application so far. "In my research, I see reading as an impersonal process, meaning the sensations that arise do not seem to belong to either the reader or the poetry, but to both at the same time,"
I recently learned a new bit of animal related slang recently, this one is for bird. When a bird lays flat on it's chest and stomach, like this it's called boating.
in Germany of the late 40s this discussion would have been called the weightiness in bags Being a child of the hippie era, I still call it cool and to where-the-pepper-grows with modern kids' slang. Ours was bestest! All been done before! Just ask Professor Henry Higgins and Colonel Hugh Pickering.