Questionable Language

I am certain that I will never write a work of fiction. I don't have the capacity, language or imagination even! (HMRC please take note.) However, I hope that does not prevent me from a good laugh at the odd word or two.
I'm reading The Trinity Six by Charles Cummings.
I happened upon this on page 192 and had a good chuckle -

...he checked his vehicles religiously as a hangover from Northern Ireland.

... I knew the Black Bush and Guinness would do for his immortal soul.