Green’s Dictionary of Slang

gobbler n.1

[despite its appearance in Grose (1785), and in Bailey, Universal Etymological English Dict. (1721 et seq.), as ‘cant’, gobbler, a turkey-cock, is SE]

1. [mid-16C–late 18C] a duck, a goose.

2. [1910s] (Aus.) a Turkish soldier [play on SE gobbler, turkey].

3. a Morroccan policeman.