So that's what the Government's so scared and hush-hush about.
This will be hush-hush for awhile, then left to dissolve of itself.
Mr. Atkins explained that naturally the affair was hush-hush.
It's all hush-hush so it won't leak out like the atom bomb did.
She was a "hush-hush" ship—one of the wonders of the Navy still.
Our Hush-hush Department seems to have grown very lax of late.
First, the government stepped in, trying to hush-hush the whole thing; but too late.
It was dark and very quiet; the hush-hush of the throbbing mines filled the night and stilled it.
And without the levies the "Hush-Hush" party was outnumbered again and again.
They are not half so mysterious as you are with that hush-hush expression on your innocent countenance.