打埋伏dǎ mái·fu 1.预先隐藏起来,待时行动{lie in ambush to wait for a chance; ambush}: 留下一排人在这里～。{Leave a platoon here to ambush them.} 2.〈比喻fig.〉隐藏物资、人力或隐瞒问题{hold (material, manpower or a problem) back; keep sth. in reserve}: 这个预算是打了埋伏的,要认真核查一下。{You should carefully check this budget, which keeps enough in reserve.}