I have always thought that "swithering" means something like "dithering" - hesitating, perplexed, not quite able to make up your mind.
And is this use of "chuckies" meaning small stones? If so, I first heard it when I left the North-East and came to live in the central belt.
Spot on
The only other time I have heard "chuckies" being used was playing football when someone got kicked in the chuckies !!