Babar Biye
A versatile Bengali swear, meaning "Father's Marriage", considered extremely offensive.
Guy 1: Keliye brindabon dekhiye debo (i'll beat u up)!
Guy 2: Toke bara keliye Babar Biye dekhiye debo! (i'll beat u so hard u will see ur father's marriage)
Guy 2: Toke bara keliye Babar Biye dekhiye debo! (i'll beat u so hard u will see ur father's marriage)