What is Hush up?
Hush up definition and meaning on Dictionary terms:
(used as a command to be silent or quiet.)
verb (used without object)
to become or be silent or quiet: They hushed as the judge walked in.
verb (used with object)
to make silent; silence.
to suppress mention of; keep concealed (often followed by up): They hushed up the scandal.
to calm, quiet, or allay: to hush someone’s fears.
silence or quiet, especially after noise.
Phonetics. either of the sibilant sounds (sh) and (zh).
Archaic. silent; quiet.