Apolo Ohno -- The Subway Card ... IS A MYTH!!!

Apolo Ohno just blew our minds ... telling TMZ Sports the mythical Subway "Free Subs for Life" card is like Bigfoot ... IT DOESN'T REALLY EXIST!!! And here's the catch ... he's kinda, sorta right. The convo was brief, but Ohno -- who's…

Kim Smith Kim Yoon jin Kirsten Dunst Krista Allen