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To create a draft, model, or simulated version of something to demonstrate how it looks or works. A noun or pronoun can be used between "mock" and "up." We mocked up a prototype of the new irrigation system to demonstrate its benefits to the city council. I sketch out the designs of our latest cars, and the engineering department mocks them up.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
mock something up
to make a model or simulation of something. The engineers mocked the new car design up for the managers to see. They mocked up the new car design.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
To make a model of something, especially as part of a presentation: We mocked up our ideas for the stage scenery to see if it would be hard to build. Take these building plans and mock them up for the presentation.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.