I use a good amount of 70s and 80s words myself.
XD

I say "Indeed" and "How goes it".

I use DUDE like every day. I've used bubba, or Buster. Moms used the phrase Burn outs before. I'll use ding dong too!

I use words from dead languages(Latin) but as for out of date words I use them alot but in a way that sounds cool..
I use the word Chill and Chillax alot.