Do you mean the song "Mick Maguire"?

Mick McGuire
Traditional

Oh, me name is Mick McGuire and I'll quickly tell to you
Of a young girl I admired called Katy Donahue
She was fair and fat and forty and believe me when I say
That whenever I came in at the door you could hear her mammy say:

"Johnny, get up from the fire, get up and give the man a sate
Can't you see it's Mr McGuire and he's courting your sister Kate
Ah, you know very well he owns a farm a wee bit out of the town
Arragh, get up out of that, you impudent brat, and let Mr McGuire sit down"

Diddle e dowdle-owdle-owdle diddle e dowdle-owdle-ow
Diddle e dowdle-owdle-owdle diddle e dowdle-owdle-ow
"Ah, you know very well he owns that farm a wee bit out of the town
Arragh, get up out of that, you impudent brat, and let Mr McGuire sit down"
Now, the first time that I met her was at a dance at Tarmagee
And I very kindly asked her if she'd dance a step with me
Then I asked if I could see her home if I'd be going her way
And whenever I come in at the door you could hear her mammy say:

Or are you referring to another one?