no obj.
1- drop saliva uncontrollably from the mouth淌口水, 流涎：
the baby begins to drool, then to cough.
婴儿开始淌口水, 接着咳嗽。
1.1
- informal make an excessive and obvious show of pleasure or desire〈非正式〉垂涎, 过分痴迷：
I could imagine him as a schoolmaster being drooled over by the girls.
我可以想象得到他是一个令女孩子们痴迷的男教师。
词源
early 19th cent.: contraction of DRIVEL.