Implies items are made quickly without much attention to craftsmanship or excellence. That novel felt rushed, like it was churned out to meet a deadline.
Pro Tip 2/3
Negative Connotation
Often suggests that the results are uninspired or lack uniqueness. With each album sounding the same, the band seems to churn out hits formulaically.
Pro Tip 3/3
Emphasis on Quantity
Used when emphasizing the large amount of something being produced, rather than its substance. The bakery churns out hundreds of loaves a day, but they're all quite bland.