What is the meaning of dummy up?

verb

8
 
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APAWordNet. (2010). dummy up. Retrieved February 23, 2019, from http://smartdefine.org/dummy_up/definitions/1271694
ChicagoWordNet. 2010. "dummy up" http://smartdefine.org/dummy_up/definitions/1271694 (accessed February 23, 2019).
HarvardWordNet 2010, dummy up, Smart Define, viewed 23 February, 2019, <http://smartdefine.org/dummy_up/definitions/1271694>.
MLAWordNet. "dummy up" 23 October 2010. Web. 23 February 2019. <http://smartdefine.org/dummy_up/definitions/1271694>