drop (one's) guard

To become less guarded or vigilant; to stop being cautious about potential trouble or danger. We'll wait long enough for them to drop their guard before we launch our invasion. There will always be people in this business looking to exploit you, so you can never drop your guard.

Common Names:

Name	Pronounced	Usage
Ngaire	NGIE-re	Maori
Nedelcho	-	Bulgarian
Akulina	-	Russian
Haris (1)	-	Bosnian, Urdu, Arabic
Lei (2)	-	Chinese
Jelani	-	Eastern African, Swahili