My Grandad sings it like this:

I was born and bred in a darling spot, famed in history
Tis the auldest part of Dublin they call the liberty
Now i'm very proud to come from there i'll wave me banner high
Sure i'll drink all night and be polite
A liberty boy am i

Now me ma me pa called me Jamesy just like my uncle Jim
He was known throughout the provinces by the women and the men
Now an Irish casanova with a twinkle in his eye
Sure i'll drink all night and be polite
A liberty boy am i

That is all i know, and to be honest my grandad is known for getting lyrics wrong, he also drinks all night.