Английский словарь американских идиом - catch off balance

{v. phr.} To confront someone with physical force or with a statement or question he or she is not prepared to answer or deal with; to exploit the disadvantage of another. * /The smaller wrestler caught his opponent off balance and managed to throw him on the float in spite of his greater weight and strength./ * /Your question has caught me off balance; please give me some time to think about your problem./