false move

and one false move

Fig. [even] a single movement that indicates that one is disobeying an order to remain still or in a nonthreatening posture. The robber threatened to shoot us if we made one false move.

Common Names:

Name	Pronounced	Usage
Urban	UWR-bahn (Polish), UR-bən (English)	Danish, Swedish, German, Polish, Slovene, Biblical, History
Yumi	yoo-mee	Japanese
Taha	-	Arabic
Svein	-	Norwegian
ÉImhear	EE-mur	Irish, Irish Mythology
Adair	ə-DER	English (Rare)