churn up

Related to churn up: churn out

churn up

To cause the movement of something in a liquid (such as sediment of some kind) by stirring. A noun or pronoun can be used between "churn" and "up." I stirred the milk and churned up bits of chocolate powder that had settled to the bottom of the glass. Because we're so close to the shore, your oars will likely churn some pebbles up.
See also: churn, up
Farlex Dictionary of Idioms.

churn something up

to stir up a liquid; to mix up material suspended in water. The oars of our boat churned the shallow water up, leaving little clouds of sediment in our wake. The oars churned up the mud.
See also: churn, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • add in
  • involve with
  • involve with (someone or something)
  • involved with
  • arrange for
  • arrange for some time
  • arrange some music for
  • back into
  • back into (someone or something)
  • angle