All God's Chillun Got Wings is a Negro spiritual song. "Chillun" is an old-fashioned dialect word for "children". (Robeson sings it as "children" in his recording, although the printed lyrics say "chillun".)
Its title inspired the Eugene O'Neill play of All God's Chillun Got Wings.
References
All God's Chillun Got Wings (song) Wikipedia(Text) CC BY-SA