throw caution to the wind
Advanced (C1)neutral
Do something without worrying about the risks.
"She threw caution to the wind and booked a one-way ticket to South America."
Hear it in context

That Listener Mail Episode: “Open Top Bus For SECOND Place!” - Our Most HEATED Games Gone? | EP. 402
That Peter Crouch Podcast · 53:59
And then I think Chelsea might throw caution to the wind

Eric Dane's "Grey's Anatomy" Success | Late Night with Conan O’Brien
Conan O'Brien · 2:27
and and throw caution to the wind and and see what happens.

Charles "AIR" Jourdain
UFC · 16:41
throw caution to the wind and go for it, but it's never the smartest approach.