Green’s Dictionary of Slang

1. (Irish) inferior, bad.

1893		F. Adams Australians 143: Considering the still semi-nomadic character of a large portion of the people, the ‘bogey’ notions held by one section of it in regard to the others exceed all reasonableness.
2001		G. Coughlan Everyday Eng. and Sl. 🌐 Bogey (adj): something wrong, as in he’s bogey or I got a bogey pint.

2. see bogus adj.