A derogatory term for someone who is very smart. That guy's a real double-dome—he probably spends all his time in the library, like a loser.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. n. an intellectual. It’s not that what the double-domes say is wrong, it’s that they are so sure that they are right that scares me.
2. mod. intellectual. Most kids need to be exposed to double-dome profs at college for a while.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.