Here's a ballad I heard in Dublin Pubs in the '60s. Would love to know the origins:

BIDDY McGRATH
(Unknown)

I'll tell to you a story that'll give you all a shock.
It's about a double murder on the Dublin docks.
The girl in question was Biddy McGrath
And she strangled two sailors with the straps of her bra.

CHORUS: With my too rye ah, fol de diddle dah,
Too rye oo rye oo rye ah.

Well, they tried hard to trick her to get into her knickers,
But smart as they were, she was very much quicker.
She remembered the story told by her ma,
And she quietly untied the straps of her bra.

CHORUS

She tied one o' the straps around the big sailor's cock
And trun him in the Liffey tied to a big rock,
The little sailor laughed and he went "ha, ha"
Till she stuffed up his mouth with the rest of her bra.

CHORUS

Well, she went home about a quarter to one,
Very happy and contented at a job well done.
She ran and told her ma and her pa
Saying, "Thanks be to Jaysus I was wearin' me bra."

CHORUS

Now if you're a young one who dates sailors at night,
Just make sure that the straps of your bra are tight.
Remember the story of Biddy McGrath.
Keep one hand on your knickers and the other on your bra.

CHORUS