That is the dumbest thing I've ever heard,

It's the dumbest thing I ever heard of.

I think that must be the dumbest one I've ever heard. I mean, every year you hear more and more rumors and some of them are so out there that after a while you just start forgetting about them.

I would say the dumbest thing I have heard is that my dad isn't my real dad.

It depends on who you talk to. Tunnels are either the greatest thing or the dumbest idea ever.

I've never heard anything bad about him - and it's an industry that gossips.