buttoned down

/ˈbʌtəndˌdaʊn/
adjective
  1. Describing a shirt with a collar that has buttons to fasten the points to the shirt.
    • She bought a blue buttoned-down blouse for the presentation.
    • He wore a crisp buttoned-down shirt to the office.
    • Buttoned-down shirts are popular for both casual and formal wear.
  2. Conventional, conservative, or formal in style or attitude.
    • His buttoned-down approach to investing avoids risky stocks.
    • She surprised her buttoned-down colleagues by suggesting a bold new idea.
    • The company has a buttoned-down culture where everyone wears suits.
Antonyms
What does "buttoned down" mean? | whatsthatwordmean | whatsthatwordmean