Letters that make dummy up
d, p, m, u, y are letters that make 'dummy up'
2 possible definitions for 'dummy up'
Under this definition, dummy up is a verb and has the following properties:
belt up, button up, be quiet, keep mum, shut up, close up, clam up have the same meaning as 'dummy up'
open up has the opposite meaning of dummy up
Under this definition, dummy up is a verb and has the following properties:
dummy has the same meaning as dummy up
"dummy up the books that are to be published"