The classic is of course, "Londonderry Air"

The last verse for the song Jolly Tinker:

Well I've been a jolly Tinker for these 40 years or more
But such a rusty hole as that, I've never blocked before.

One of my non-musical favorites is from the UK comedy Thin Blue Line - there is a lot of them in the show, but the best of them (especially from an American's perspective) was the one when the head of the detective squad was afraid that a mistake made by Rowan Atkinson's character would get him fired. The quote: Your cock-up: my ass! How that ever made it past even the Public Broadcasting Censors in the U.S. is beyond me.

pax yall