keep secret
131keep dark — (from Idioms in Speech) to keep it a secret But keep it dark we don t want to alarm him just yet. (A. Christie) I don t see how anyone else but Parker could have sent it. Depend upon it, his own man. But keep it dark we don t want to alarm him… …
132keep a lid on — verb To keep something secret. Its supposed to be a surprise, so try to keep a lid on it, will you? …