big iron(redirected from a big iron)
slang A very fast and powerful mainframe computer. A basic computer won't work—we need the big iron for this project.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a large, mainframe computer. (see also iron.) We’ll have to run this job on the big iron over at the university.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.