Paul is using a metaphor meaning that everything people say is unrighteous and disgusting (See: [[rc://en/ta/man/translate/figs-synecdoche]], [[rc://en/ta/man/translate/figs-metaphor]])
## Their mouths are full of cursing and bitterness ##
"Much of what people say is harmful and meant to hurt other people" (See: [[rc://en/ta/man/translate/figs-hyperbole]], [[rc://en/ta/man/translate/figs-synecdoche]])