Stone age shit

When someone show's a unfunny meme that should've died ages ago, Normally some examples is 9 + 10, deez nuts, momo challenge, ugandan knuckles, dab, sanic and more. Normally it's highly unfunny that you wonder what age they're in, But stone age is probably where they are living in right now.

Mike: Shows Ugandan Knuckles Pic
Benny: Na don't post that, that is some stone age shit bro.