dam up

dam up

To block something from flowing freely, typically water in a stream, river, etc. A noun or pronoun can be used between "dam" and "up." If we don't dam up the river, this rain will cause a flood.
See also: dam, up
Farlex Dictionary of Idioms.

dam something up

to erect a barrier in a river, stream, brook, etc. We are going to have to dam this stream up to make a pond for the cattle. Let's dam up this stream. Why is this river dammed up?
See also: dam, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • involve with
  • involve with (someone or something)
  • involved with
  • load in
  • turn down
  • rule with an iron fist
  • rule with an iron hand
  • rule with an iron hand/rod, to
  • rule with an iron rod
  • iron hand (in a velvet glove), to rule with an