I learned this from Girlscout camp.

Oh a lay oh o-kee-ok

There are suitors at my door (oh a lay oh a kee ok)
six or eight or even more (oh a lay oh a kee ok)
and my father wants me wed (oh a lay oh a kee ok)
or at least that's what he said (oh a lay oh a kee ok)

Chorus: oh lay oh la, oh a lay oh a kee ok
oh lay or la, oh a lay oh a kee ok
oh lay oh la, oh a lay oh a kee ok
oh lay oh la, oh a lay oh a kee ok

And I told him that I will (oh...)
When the rivers run up hill (oh..)
Or when fish begin to fly (oh..)
Or the day before I die (oh...)

Chorus

Irrigation runs up hill (oh...)
doesn't that give you a thrill (0h...)
flying fish do really fly (0h...)
and tomorrow I may die (oh..)

Chorus, last time ending with an extra( ah kee ak)