I think, from the context, that "bohay" must refer to wine. I did a brief Google search and found some wine under "bohae". But I don't know.

I omitted the third verse to save myself some typing in case no one was interested in the thread. Here's the verse -

Sweet whisky, you're a coaxer, I'd best keep away,
If your lips I once taste, sure its wid you I'd stay,
So I'll make up my mind, and my mouth too, this day,
To drink no more whisky till I'm sober.