Question

HOW DO YOU SAY SHUT UP IN GERMAN?????

Answer 1

I think it is Halt den mund. 

Answer 2

'te twa' is shut up in french. 
and 'den Mund halten' is shut up in german. 
:)
I asked my German teacher and she says it is 'Den Mund Halten'. Pronounced 'den-mun-dalt-en.

:)