Someone gave me this years ago. I went and dug it up for the occasion...enjoy. (Pull out your best Finnglish; you're gonna need it. Never mind. I translated for those who need it.)
Ooksie Kooksi Koolam Vee,
(One, two three, four)
Sant Urho is ta poy for me.
(Saint Urho is the boy for me.)
He sase out ta hopperce as pik as pirts,
(He chased out those grasshoppers as big as birds)
Nefer pefore haf I hurd tose verts.
(Never before have I heard those words)
He really tolt tose puks of kreen -
(He really told those bugs of green)
Prafest Finn I effer seen.
(Bravest Finn I ever saw)
Some celebrate for Saint Pat unt his nakes,
(Some celebrate for Saint Pat and his snakes)
Put Urho poika cot fhat it takes.
(But Urho boy got what it takes.)
He cot tall unt trong from feelia sour,
(He got tall and strong from sour milk (I think))
And ate kalla moyakka effery hour.
(And ate fish stew every hour.)
Tats fhy that kuy could sase those peetles
(That's why that guy would chase those beetles)
Fhat crew as tick as chack pine neetles.
(That grew as thick as jack pine needles)
So let's gif a cheer in our pest way
(So let's give a cheer in our best way)
On ta sixteent of Mats, St. Urho's Tay!
(on the sixteenth of March, St. Urho's Day!)
Also, worth reading: this guys blog.