dummying up

Verb

dummy up (third-person singular simple present dummies up, present participle dummying up, simple past and past participle 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. (imperative, informal, sometimes) 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.