Ridicule dummy (4)
I believe the answer is:
mock
I believe this is a double definition.
'ridicule' is the first definition.
(I've seen this before)
'dummy' is the second definition.
(thesaurus)
(Other definitions for mock that I've seen before include "cod" , "Tease - fake" , "Deride - false" , "Tease or laugh at" , "Deride; sham" .)