be caught off (one's) guard(redirected from were caught off his guard)
Like this video? Subscribe to our free daily email and get a new idiom video every day!
be caught off (one's) guard
To be taken by surprise; to be caught when one is vulnerable, careless, or inattentive. We'll wait until he's caught off guard, and then we'll take him and his company for all they're worth! Don't be caught off your guard. There are a lot of suspicious characters around here.