Obs. Colloq. contraction for by my.
1571. R. Edwardes, Damon & Pithias, in Hazl., Dodsley, IV. 73. Bum troth, but few such roisters come to my years.
1578. Whetstone, Promos & Cass., in Reed, Dodsley, IV. 7 (N.). Nay, bum-ladie, I will not.
