"No, I won't put it on your bill, said the barman."
I've said for a long time that I won't get involved with puns. I think it was this song that got this particular pun into my head, and I've been enjoying drawing Crow recently in various poses and expressions. (I've gradually twigged that the secret is not to be afraid of exaggeration. Not something Uncle Zap's had any trouble with but it takes some courage for me to make eyes or a beak a bit bigger.)
In mitigation, this isn't really about the pun, but the way Crow's toying with Maureen.