An arrogant, domineering man; so called from the Turkish
viceroys and provincial governors, each of whom bears the title of bascha (pacha).
A three-tailed bashaw.
A beglerbeg or prince of princes among the Turks, having a standard
of three horse-tails borne before him. The next in rank is the bashaw with
two tails, and then the bey, who has only one horse-tail.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894