To keep quite on something. Has the exact same meaning and is just another way of saying down low.
"You better keep it on the hush about that shit."
by IceWarm June 21, 2004
To remain secretive regarding a certain topic.
Yo baby I know your man will flip if he found out about us having sex when he's gone so... "keep it on the hush"
by SouthBound October 07, 2005