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How did the meaning of uptight change after it spread beyond drug users?

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The term "uptight" originated in 1934, initially describing someone who was tense, nervous, or uneasy. While the word later gained specific connotations within drug-culture slang, its meaning expanded significantly as it entered broader usage.1

Beyond its initial association with anxiety or drug-related tension, the term evolved to describe people who are angry or indignant about minor issues. Furthermore, it took on a sociological dimension, frequently being used to characterize individuals or groups as "rigidly conventional". In this modern context, being "uptight" often serves as an antonym to being relaxed, calm, or easygoing, specifically highlighting a lack of flexibility in social or personal behavior.12