Rad
Beans (as in "That's the beans!")
Gnarly
Groovy
Milk drinker (as an insult. It means "You're a baby that still drinks milk" good for insulting white people)
As an old white milk drinker who still unironically says rad, I can say with some authority that it was always “cool beans” and never just “beans”.
I hear lots of people still saying rad, and I think that's rad
I use rad, gnarly and groovy daily. I'd like to see some old timey insults come back like Blockhead or Pumpkin Lilly
I don’t know. Saying “milk drinker” makes you sound like a total Melvin.
I AM NOT A MELVIN
Having to assert you aren't a Melvin is a prime characteristic of a Melvin
I say rad, grouse, sick. My dad says groovy. We're cool.
grouse
It is an invocation of your name, and the coolness it brings forth. Grouse as a mouse in a house 
Hell yeah
I use sick very frequently.
Gen Z still uses sick and dope pretty often, not out of use in the same way rad or groovy are
I've literally never heard "grouse" before tho lmao
-Tubular
-Bogus
RELEASE THE BOGUS
I want the word humbug to come back. I want to call someone a pettifogging humbug like it's the 1890s.
I still use rad, albeit exclusively to refer to animals irl and monster designs in media.
"That's a rad little dude." -me, looking at cool bug.
Far out. It's so cheesy and charming lol
This and milkdrinker are the only ones I agree with
I always use far out when referring to my tastes in music
It's still in use in Australia. Generally by adults that were about to say fuck then realised there are toddlers present.
A legend was born.
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy:
Twenty two ski doo
I say rad all the time
we are the radical legion
That's aces, comrade
I’m Audi 5000
Sweet!
23 skidoo
"dope as heck"
I still use these cos I'm an old fart
I still say rad and gnarly.
Tubular!
Dweeb or Pomo would be ones that I'd like to see come back. Rad (My wife says this all the time, she's rad ^^)
Dweeb is so funny. Love to call ppl dweebs
MIlksop is an even better version than Milkdrinker.
"And who doth lead them but a paltry fellow, Long kept in Bretagne at our mother's cost A milk-sop, one that never in his life Felt so much cold as over shoes in snow?" -Richard III
Fresh!
That skibidi owl don't rustle my jimmies.
When the fuck did groovy go out of style? That word has been part of my lexicon for like a decade yo.
dipweed
Wubaluba dub dub
And that's the WAAAY the news goes!
U reek of milk
Yeah if you eat milk you should get called cow pus drinker, bloodmouth, carnist scum, calf killer, etc. At least a little bit.
Banned? DM Wmill to appeal.
No anti-nautilism posts. See: Eco-fascism Primer
Gossip posts go in c/gossip. Don't post low-hanging fruit here after it gets removed from c/gossip