Best definition
Wiki scholar
Someone who thinks they know everything about life even though they’ve never left the house and experienced anything for themselves.

They come off like they’re knowledgeable but only for the sole purpose of impressing others. In reality, they’re looking up articles on Wikipedia that probably aren’t even accurate.

“I know all about the grunge era because I was there when it happened.”

“No you weren’t, you’re just a douchebag Wiki scholar who’s never even been outside. Turn off the computer and get a life.”