dummy up
动词- To make a mock-up or prototype version of something, without some or all off its intended functionality. · The carpenters dummied up a set of simple props for the rehearsals.
- To make a fake version of something; to make a counterfeit.
- To suddenly stop talking; shut up; to keep a secret; to refuse to talk. · When he couldn't think of any more good lies, he just dummied up.· Everyone was discussing the new teacher, but when she entered the room they all dummied up.
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