Off her guard - Idioms by The Free Dictionary
off (one's) guard (redirected from off her guard)
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off (one's) guard
Not being especially careful or vigilant; not prepared for danger or surprises; being careless or inattentive. He's got a lot of tricky moves, so don't be caught off your guard! We'll wait until he's off his guard, and then we'll take him and his company for all they're worth!
References in periodicals archive
The second-half started lively with both sides opening up chances with Cardiff strikers Zoe Atkins and Bethan Lloyd looking menacing going forward, and Leicester's midfielder Erica Kilby tried a couple of long range efforts to try and catch Nokes off her guard
SUPER-smooth Chico catches Glenda Gilson off her guard
over the weekend - by planting a smacker on the TV presenter's cheek.
The mugger must have seen this and snatched Betty's handbag while she was off her guard