'Cool' Always Has Place in Modern Lexicon - Yahoo! News:
NEW YORK - Groovy is over, hip is square, far out is long gone. Don't worry, though - it's cool.
'Cool' remains the gold standard of slang in the 21st century, as reliable as a blue-chip stock, surviving like few expressions ever in our constantly evolving language. It has kept its cool through the centuries - even as its meaning changed drastically.
How cool is that?
Way cool, say experts who interpret slang for their messages about society.
Groovy is over? When did that happen?