factoid
A tiny fact that's either true or a waste of your time. It's like a pebble in your shoe, but for facts.
"Did you know the moon is made of cheese?", said by a kid who’s never had cheese.
"That’s not even a real fact, it’s just a factoid.", said by a teacher who didn’t check the facts.
"I swear this is true, I saw it on the internet.", said by someone who’s never seen the internet.