Which of the following is NOT a common characteristic of slang?

The characteristic that is not commonly associated with slang is a highly formal structure. Slang is typically characterized by its informal and casual language, which often deviates from standard grammatical and syntactical rules. Unlike formal language, which adheres to established conventions and structures, slang thrives on creativity and spontaneity, allowing for innovative expressions and regional variations. Additionally, slang evolves over time, often reflecting cultural shifts and trends within specific communities. This fluid nature of slang contrasts sharply with the rigidity implied by a highly formal structure.