churn somebody/something ↔ up phrasal verb (see also churn)

1. churn something ↔ up to damage the surface of the ground, especially by walking on it or driving a vehicle over it:
The lawn had been churned up by the tractor.

2. churn something ↔ up to move water, mud etc around violently:
The oars had churned up the mud, clouding the water.

3. British English to make someone upset or angry:
Though she looked calm, in reality she was churned up inside.

[TahlilGaran] Dictionary of Contemporary English ▲