水泄不通

水泄不通 [shuǐ xiè bù tōng]

1. ■ ... even a drop of water couldn't leak out [trickle through]; (to besiege ...) so closely that not a drop of water could have trickled through; be watertight; tightly packed; jam:

挤得水泄不通 crowded so tightly that you can't move; be packed with people;

包围得水泄不通 so closely surrounded that it is impossible to break out