secrethat
nounUK /ˈsiːkrəthæt/
US /ˈsiːkrəthæt/
A secrethat is a special hat you wear when you want to keep a secret.
Mia put on her secrethat before telling her friend the big surprise.
OTHER MEANINGS
2. A hat that holds tiny secret notes inside its lining.
He pulled a folded note from his secrethat and smiled.
3. A magical hat that makes what you say impossible for others to hear.
With her secrethat on, Lily could tell the plan to her brother without anyone else hearing.
4. A playful name for a person who keeps secrets very well.
You can trust Sam—he's a real secrethat.