or -lady, phr. (old).By my troth. Bum-ladie = by my lady.
1571. EDWARDS, Damon and Pithias [DODSLEY, Old Plays (REED), i., 211]. No, BUM TROTH, gond man Grumbe, his name is Stephano. Ibid., 220. BUM TROTH, but few such roysters come to my yeares at this day.
1578. WHELSTONE, Promos and Cassandra, IV, 7. Nay, BUM-LADIE, I will not by St. Anne.