the word 'eighties' is the least credible word in the english language. →[More:]I'm editing. i have a sentence with that word in it. I cannot possibly believe it. Excuse me, "the eighties?" no, no, certainly not.
Possibly "the 80's," but even then probably only with Michael Ian Black doing something lame on VH1 to pay the bills.
Come on. "Eighties?" Never.