WordNet
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 her guard, off your guard]
Usage examples of "off his guard".
The bang of the stern-chaser beside him caught him off his guard and almost startled him out of his wits - he hoped no one noticed the nervous jump which nearly lifted him from the deck.
Still, there'd be things Phule hadn't briefed the double on, questions he wouldn't be able to answer if somebody caught him off his guard.
So she had recourse to an old Greek woman, that was very skilful in compounding poisons, whom by promises and gifts she, induced to distill a deadly water, which, keeping her own counsel, she herself gave Restagnon to drink one evening, when he was somewhat heated and quite off his guard: whereby—.
If you question him when he is off his guard, you will find that whenever a Jew engages in a bit of share practice he says, how like a Jew, but when a Gentile does likewise he says and, you know, the astonishing thing is that he is not a Jew.
They would probably get close enough, while Gollum was gorging and off his guard.
A temporary pause, when taken off his guard, gave him the vital moment in which to think and determine his action.
As long as I might be thought to be pursuing him, the criminal would be off his guard.