dummy up

present singular third person dummies up · participle present dummying up · participle past dummied up · past dummied up

1. 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.

2. To make a fake version of something; to make a counterfeit.
3. imperativeinformalsometimesTo 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.

   1 more example

   Everyone was discussing the new teacher, but when she entered the room they all dummied up.