A lighthearted or euphemistic expression used to announce or inquire about problems, difficulties, or unrest at work, especially in a factory or workplace context.
A phrase used figuratively to signal that something is amiss within a group, organization, or household.
Examples:
EN: So, John, there's "trouble at mill!"
ES: Entonces, John, hay problemas en el molino?
EN: Mr Wentworth just told me to come in here and say there was trouble at mill, that's all.
ES: El sr. Wentworth me dijo que le contara que hay problemas en el molino.