[Windflier]

...a few things (”cool beans” “do me a solid”) that could only ever be said by a geeky high school student trying to imagine they sounded cool.

Er... I was a twenty-something in the seventies and used those two phrases frequently. So did my bros.

[marajade]

I can’t stand the use of the word “bro.”

[dfwgator]

I knew a girl in the 80s that said “Cool Beans” all the time.

[Trump_the_Evil_Left]

oops, sorry! ;^)

maybe regional variations....??