The following was the version I heard:

O’Rafferty’s pig was a wonderful animal
Built like a battleship solid and stout,
His ignorance would have disgraced any cannibal
Impudence written all over his snout.
The night he broke loose there was such a commotion
With women all screaming and men turning pale,
Running and jumping colliding and bumping
And everyone making a grab at his tail.

Micky Malone the heavyweight champion ran at the pig with a big rolling pin,
He attempted a blow, but caught Mrs Monroe and shifted her bustle right under her chin.
Widow Malone fell through a shop window
In pickles and jam and red herrings she lay
She had salmon and kippers all over her knickers,
The night that O’Rafferty’s pig ran away.

It ran in the police court and looked at the prisoner
Swallowed the Bible, said the judge infra dig
And because of these ructions the case is stood over
But the Clerk of the Court said, "We must try the pig"
The pig looked at Riley the principal witness
Then ran in the grocers next door to McCann's
He rolled in the butter then dashed into the gutter
And that’s how he kept slipping out of their hands.

Fat Mrs Doyle she ran like an elephant
Puffing and blowing with Mrs McGuire,
She fell on the ground and begorra the sound
It was just like the burst of a pneumatic tyre.
Flanagan then got the pig in a corner
He jumped on its back, it ran under a Dray,
At twenty to seven his home was in heaven
The night that O’Rafferty’s pig ran away.

A bloodthirsty crowd led by old Dennis Cassidy
Chased the pig with vengeance from Derry to Cork
And didn’t they swear when the pig with audacity
Jumped on a tram while they all had to walk.
It ran through the legs of old Councillor Duffy
A man of great standing and lofty ideals
When they collided old Duffy backslided
And down went the standing of twenty-five years.

Burke’s wooden leg was broken and shattered
He lay on his back shouting Doctor Lamont
Barney O’Toole said ‘Don't be a fool,
It’s a hammer and saw and a joiner you want.’
Then came the news the pig had been captured
The town had a thanksgiving supper they say
Of cabbage and bacon unlawfully taken,
The night that O’Rafferty’s pig ran away.