出其不意地对某人下手, 使某人来不及对付的英文

catch sb with his pants down

• 出其不意:    take sb. by surpri ...
• 地:    the earth
• 对:    answer; reply
• 某人:    a certain person
• 下手:    put one's hand to; ...
• 使:    send; tell sb. to ...
• 来不及:    there's not enough ...
• 对付:    deal with; cope wi ...