Someone so obsessed with retro lifestyle/clothes/games/music ect that nothing else is of any interest. Also spends alot of time on collecting/making/maintaining their "retro lifestyle".
I'm such a retrotard that;
"I only listen to music produced in the 50's - period"
"I'm obsessed with super mario/snake/megaman ect"
"I only buy and own vintage clothing/furniture"
"if it's not older than me - it's crap"