We used to sing a version of Mademoiselle from Armentieres about a fart. Blessed if I can remember all of it, but snippets were:

The fart went rolling down the street,
Knocked a copper off his feet.
The copper drew his rusty pistol
And shot the fart from here to Bristol...

The Pope of Rome was drinking gin
The fart flew down and fell right in.
The fart went rolling down his spine
And knocked his knackers out of line.

Ah, such memories of such rubbish!