curse (someone) under (one's) breath

To murmur something in such a soft, quiet voice that others cannot hear it distinctly. (Said especially of rude, unpleasant, complaining, or impertinent remarks.) I could hear Bill cursing the boss under his breath as he walked back to his desk after his annual review. If you curse under your breath around me again, I'll tan your hide so quick it will smart for a week!

Common Names:

Name	Pronounced	Usage
Liesbeth	LEES-bət	Dutch
Clementine	['kleməntain]
Ivo (1)	EE-vo (German, Dutch, Italian), EE-fo (German), EE-voo (Portuguese)	German, Dutch, Italian, Portuguese, Czech, Ancient Germanic
Gracia	GRAH-thyah (Spanish), GRAH-syah (Latin American Spanish)	Spanish
Livio	LEE-vyo	Italian
Tuulikki	TOO:-leek-kee (Finnish)	Finnish, Finnish Mythology