hush up

hush up (third-person singular simple present hushes up, present participle hushing up, simple past and past participle hushed up)

1. (intransitive, informal) To become quiet; to cease making sounds.

   Hush up now; you have talked too much.

2. (transitive) To keep secret, to prevent from becoming known.

   They hushed up the suicide to prevent bad publicity.

• (become quiet): hush, hush down, quiet down, quieten down, shut up

• conspiracy of silence, wall of silence