WordNet
off her guard
adj. not prepared or vigilant; "the blow caught him napping"; "caught in an off-guard moment"; "found him off his guard" [syn: napping, off-guard(a), off guard(p), off one's guard(p), off his guard, off your guard]
Usage examples of "off her guard".
The talk of going off to tell his story to the Emperor had been merely a ruse, to put her off her guard and get her feeling anxious.
To throw this young woman off her guard, I have never set foot in our house since, though I've communicated with Mrs.