dress down
Intermediate (B1) informal
To wear casual clothes instead of smart ones, or to tell someone off in a serious way.
"Fridays are when we get to dress down at the office — I usually wear jeans."
Hear it in context
The State of Modern War: Palantir & Anduril Execs on Drones, AI, and the End of Traditional Warfare
All-In Podcast · 1:50
to dress down and don't screw it up too bad, but we loved him immediately,
I made $250M in one year. Here's what it actually cost me
My First Million · 75:30
but and like we should like dress down and not show our wealth as as much.