"[lie] through {one's} teeth" 的定义和意义

What is the origin of the idiom "lie through one's teeth" and when to use it?

The idiom "lie through one's teeth" finds its origin in the literal act of lying with great audacity or boldness. The phrase emphasizes the extent to which someone is lying by focusing on the use of their teeth, which are typically associated with speaking and articulating words. It implies that the person is intentionally and shamelessly telling a blatant falsehood, often with a deliberate intention to deceive or mislead others. The idiom is commonly used to describe someone who is lying with full knowledge and without any remorse, emphasizing the level of dishonesty involved.