bifid tongue ― split tongue

[…] and jiggetting to outlandish countries, you'll do well to give her a hint to keep astern of me; for I shall never uphold a person who behaves o' that sort.

Do not try to fix a squinting modifier by inserting a comma to make your readers pause.

She was always in a fearful hurry, and the lower the bosom was cut the more it was to be gathered she was wanted elsewhere.