The phrase I’ll be a John Brown or I’ll be John Browned means “I’ll be damned” or “I’ll be hanged.” It’s a reference to the militant abolitionist John Brown, who in 1859 led 21 men on a raid of...
The exclamations “I’ll be John Brown!” and “I’ll be John Browned!” have a sticky history, going back to view that the abolitionist John Brown was doing something damnable by arming a slave revolt. This is part of...