Now, if you say groovy, you're ...a throwback
Or so far behind you are ahead - again.
Did I debate you in high school?

I'm of the opinion that there is a Cabal Of Intriguers (COI)
who decide on a phrase, arrange to have it dropped into printed and spoken language for the sole purpose of annoying people. Since these words/phrases cause much tooth-gnashing I suspect COI has a good many dentists in its membership.
And of course at meetings the COI gleefully peruse language forums like this to see how well they are doing.
I volunteer to find this cabal, seduce them into compliance, gain entry to their secret happenings and then expose them to the world to end the abuse of innocent slang!