This speaks of how wicked people enjoy doing evil by saying that they swallow iniquity as easily as they swallow food. AT: "the wicked enjoy doing evil as much as they enjoy eating food" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The phrase "the mouth of the wicked" represents wicked people. AT: "wicked people swallow" or "the wicked swallow" (See: [[rc://en/ta/man/translate/figs-synecdoche]])