fuck around and find out

verb2

1. •
   (slang, vulgar) To experience the negative consequences of engaging in a risky course of action.

   • “A'ight, you keep on waiting. She gon' fuck around and find out on her own”. — 2014
2. •
   To engage in trial and error or experimentation, especially when it involves serious risk.

   • What makes fucking around and finding out into science is that you write down your findings.