The meaning of the idiom Dutch Courage is the courage or confidence that people acquire by consuming liquor before attempting any courageous deeds.
1. The tailor trembled when he heard his wife relate the previous day’s events, during which, he had, with dutch courage, insulted the chief of the village in front of the people.
2. That Larson had been bursting with dutch courage in the last year’s fair was evident by the meek ways in which he avoided confrontation with anyone and everyone.