be caught nappinginformalREADY to not be ready to deal with something when it happens, although you should be ready for it 没有防备，一不留神 The German team were caught napping and Lampard scored the winning goal. 趁德国队一不留神，兰帕德攻入了制胜的一球。
be caught napping• I was reminding the golfing spirits that I could not be caught napping.• Quakers were caught napping again two minutes later.• Nowadays, no company can afford to be caught napping by a technological development.• Stock traders who ignore these signs are in danger of being caught napping when a recession hits.
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