Kick the bucket has nothing to do with pails. An idiom is a fixed or semi-fixed expression whose overall meaning cannot be deduced transparently from the meanings of its parts.

Idioms range from fully opaque phrases to more transparent collocations with specialized senses. They often carry cultural coloring and resist word-for-word translation. Speakers store many idioms as chunks while still allowing limited internal variation.

Language teaching treats idioms as units to be learned explicitly. Corpus work shows which idioms stay frequent and which fade. Creative speakers twist idioms for humor or critique, relying on the audience’s knowledge of the conventional meaning.

• Expression with non-compositional meaning
• Often culturally specific and hard to translate literally
• Stored as a chunk
• Frequent in teaching and wordplay