under hat

under (one's) hat

As a secret or in confidence: Keep this information under your hat.

Name	Pronounced	Usage
Ainslie	['einzli]
Vitaliy	vee-TAH-lee (Russian)	Russian, Ukrainian
Swarna	-	Indian, Telugu, Hindi
Munya	-	Arabic
Anderson	AN-dər-sən	English
Lawler	['lɔ:lə]