marble dome(redirected from marble-dome)
A thoroughly stupid person; someone with no sense or intelligence. Don't listen to any advice that marble dome gives you—he's only got a job here because of who his daddy is. There's no way I'll lose to a marble dome like you.
n. a stupid person. (Someone who has marble where brains should be.) The guy’s a marble dome. He has no knowledge of what’s going on around him.