Roddy White says Falcons fans asking the team to move on from Matt Ryan are a bunch of idiots ... telling TMZ Sports, "That's just crazy to me, man!"

"Move on for what?!" White told us out at LAX this week. "What you going to move on to?!"

The 34-year-old QB is still in the middle of a 5-year, $150 MILLION contract ... but there's been a growing rumble from some fans in Atlanta that say it's time to find his replacement.

When we asked White about that Tuesday, he told us he thinks that's crazy, saying, "He owns every [Falcons] record for a quarterback up to this point, which is ridiculous."