I've recently watched the movie "The Lighthouse" directed by Robert Eggers and in one of the scenes in the movie two main characters were singing a song containing following lyrics:
"Doodle let me go, me girls, doodle let me go,
Hurrah, me yaller girls, doodle let me go!"
Similar lyrics can be found in this song A. L. Lloyd - Doodle Let Me Go.
Could you help me to understand what "doodle let me go" and "yaller girls" phrases mean?