1 A girl/guy who doesn't stand out much in today's society, but would be very hot back in the 1980's.
2 Someone who has 80's style all around (Hair, Fashion, Music) and looks weird in the 21st century
1. Guy 1: Check out her, she's hot.
Guy 2: Meh, she's Acceptable in the 80's
2. Guy 1: Why is he listening to Axel F?
Guy 2: God I don't know why.
Guy 1: Dude that's only acceptable in the 80's.
From the Calvin Harris song "Acceptable in the 80s", used to define something that is cool, because its retro
. Can also be used in reverse as an insult
"I love the NES, That was acceptable in the 80s"
"Your face wasn't acceptable in the 80s"